• The male reproductive system consists of a pair of testes that produce sperm (or spermatozoa ), ducts that transport the sperm to the penis and glands that add secretions to the sperm to make semen (see diagram 13.2). (wikibooks.org)
  • The scrotum is the sack of skin beneath the penis. (kidshealth.org)
  • They are located in the scrotum under the penis. (medlineplus.gov)
  • The other parts include the penis, scrotum, and testes. (medicalnewstoday.com)
  • the wrinkled pouch of skin that hangs behind the penis between the man legs holding his testis . (urbandictionary.com)
  • These small structures are enclosed in the scrotum behind the penis. (bidmc.org)
  • They are two egg-shaped glands inside the scrotum, a sac of loose skin that lies below the penis. (medlineplus.gov)
  • Children were most likely to have injuries of the female external genitalia, scrotum/testes, or penis. (renalandurologynews.com)
  • The scrotum is the sack of skin under the penis. (childrensdayton.org)
  • Spots, bumps and moles are common on the scrotum and penis, and don't usually mean anything.If you play a sport where a blow, boot, or ball could damage your testicles, wear a plastic protector or shield. (spunout.ie)
  • This surface of the penis, ventral surface of the has a negative effect on national health care glans (glanular hypospadias), in the penis programmes as such a system could provide shaft distally (distal penile hypospadias) or medical researchers and health planning proximally (proximal penile hypospadias), authorities with the statistical information down to the scrotum (scrotal hypospadias) necessary for future health strategies. (who.int)
  • The percentage of officers indicating that they experienced numbness to the buttocks, scrotum, or penis decreased from 73% while using traditional saddles at the beginning of the study to 18% after using no-nose saddles for 6 months. (cdc.gov)
  • It may be difficult to feel the testicle if there is fluid in the scrotum. (medlineplus.gov)
  • Sudden, severe (acute) pain in the scrotum or testicle that lasts for more than a few minutes is an emergency. (medlineplus.gov)
  • While prematurity is a leading cause, other causes may include hormonal disorders, retractile testes (a muscle reflex that causes a testicle to move back and forth from the scrotum to the groin), testicular absence or the cause may be unknown. (choc.org)
  • Undescended testes can be unilateral (involving only one testicle) or bilateral (involving one testicle). (choc.org)
  • Undescended testicles (cryptorchidism) refer to a condition in which the testicle does not drop and cannot be brought into the scrotum with external manipulation. (cincinnatichildrens.org)
  • If a testicle can be brought down into the scrotal sac, even if it bounces back up again upon release, it is a retractile testis. (cincinnatichildrens.org)
  • the testicle is located, freed from restrictive tissues, positioned and anchored in the scrotum. (cincinnatichildrens.org)
  • A mature animal in which one or both testes have not descended is called a cryptorchid and is usually infertile if both testicles have not descended. (wikibooks.org)
  • Inside the scrotum are two testes , or testicles. (kidshealth.org)
  • In most males, the testicles are attached to the scrotum, making it hard for them to twist. (kidshealth.org)
  • In males who have the bell clapper deformity, the testicles are unsecured and can move and twist in the scrotum. (kidshealth.org)
  • You'll feel a sudden, possibly severe pain in your scrotum and one of your testicles. (kidshealth.org)
  • Doctors can greatly reduce your risk of another torsion by doing a simple surgical procedure that secures your testicles to your scrotum. (kidshealth.org)
  • A doctor will examine your scrotum, testicles, abdomen, and groin and might test your reflexes by rubbing or pinching the inside of your thigh. (kidshealth.org)
  • The testicles (also called the testes) are the male reproductive organs that produce sperm and the hormone testosterone. (medlineplus.gov)
  • The testicles may not have descended properly in the scrotum. (medlineplus.gov)
  • Resolution occurs as the testicles (or testes) descend from the small internal passageway that runs along the abdomen near the groin into the scrotal sac. (choc.org)
  • These retractile testicles are in the scrotum at other times and do not need treatment. (cincinnatichildrens.org)
  • In cases in which both sides are undescended, hormonal treatment may aid the testicles' descent into the scrotum. (cincinnatichildrens.org)
  • The testicles, or testes, are part of the male reproductive system. (medlineplus.gov)
  • A C-Ring holds the testicles down and keeps the testes from contracting thus slowing down ejaculation. (tantusinc.com)
  • Testicles that have descended, but are prone to retracting out of the scrotum, are called retractile testes and while the phenomenon usually resolves over time they are at increased risk of evolving into a true undescended state. (sciencebasedmedicine.org)
  • Inside the scrotum are two testes (plural of testis), also called testicles. (childrensdayton.org)
  • Most of the time, the testicles are attached to the scrotum, but in this condition the testicles aren't attached, and are more likely to turn and twist within the scrotum. (childrensdayton.org)
  • If your son has testicular torsion, he'll feel a sudden, possibly severe pain in his scrotum and one of his testicles. (childrensdayton.org)
  • When you get to the hospital, a doctor will check your son's scrotum, testicles, stomach and groin and might test his reflexes by rubbing or pinching the inside of his thigh. (childrensdayton.org)
  • In rare cases, the doctor might be able to untwist the spermatic cord by pushing on the scrotum, but most of the time surgery will still be needed to attach both testicles to the scrotum to stop torsion from occurring in the future. (childrensdayton.org)
  • During surgery, the doctor will make a small cut in the scrotum, untwist the spermatic cord and stitch both testicles to the inside of the scrotum to stop future torsions. (childrensdayton.org)
  • How do testes descend in relation to it? (freezingblue.com)
  • In many animals (including humans) the testes descend into the scrotal sacs at birth but in some animals they do not descend until sexual maturity and in others they only descend temporarily during the breeding season. (wikibooks.org)
  • Mammals are the only animals in which the testes descend from their point of origin into a scrotum. (wikipedia.org)
  • Cryptorchidism is more commonly seen in premature males because the testes do not descend from the abdomen to the scrotal sac until the seventh month of fetal development. (choc.org)
  • Some children may be examined periodically for a length of time to allow the testes to naturally descend. (choc.org)
  • Then during the 7th to 8th month of the pregnancy, the testes descend into the scrotum. (chkd.org)
  • Rarely testes descend but do not end up in a normal anatomical position, settling in surrounding tissue such as the superficial inguinal pouch or suprapubic region. (sciencebasedmedicine.org)
  • As the fetus matures, the testes descend into the scrotum. (medscape.com)
  • A developmental defect in which a TESTIS or both TESTES failed to descend from high in the ABDOMEN to the bottom of the SCROTUM. (bvsalud.org)
  • The evolutionary adaptive advantage of testicular descent into an extra-abdominal position may be related more to the enhanced sperm storage capacity of the epididymis at lower extra-abdominal temperatures than to the testis itself. (wikipedia.org)
  • In this context, the proportion (26% of total) of mature sperm stored intra-abdominally in the monotreme epididymis is considerably less than the proportion of mature sperm stored in the epididymis of many eutherian mammals (50-75% of total) with descended testes. (wikipedia.org)
  • In conclusion, the evolution of descended testes was promoted by the lower extra-abdominal temperature of the cauda epididymis which increased oxygen availability to sustain and store more sperm. (wikipedia.org)
  • Anatomical evidence for the epididymis as the prime mover in the evolution of the scrotum. (wikipedia.org)
  • Overview of Urinary Tract Symptoms Kidney and urinary tract disorders can involve one or both kidneys, one or both ureters, the bladder, or the urethra, and in men, the prostate, one or both testes, or the epididymis. (msdmanuals.com)
  • Sperm is produced in the testes and is transported through the epididymis, ductus deferens, ejaculatory duct, and urethra. (medscape.com)
  • The epididymis is a C-shaped structure lying intimately along the posterior border of each testis and includes an enlarged head, a body and a tail. (medscape.com)
  • Vasculature and innervation of the epididymis is the same as for the testes (see the image below). (medscape.com)
  • 1, 2] The convoluted portion of the ductus deferens becomes straighter (diameter, 2-3-mm) as it travels posterior to the testis and medial to the epididymis. (medscape.com)
  • In the male the paramesonephric ducts atrophy (but traces of their anterior ends are represented by the appendix of testis of the male), while their terminal fused portions form the prostatic utricle in the floor of the prostatic urethra. (wikipedia.org)
  • The testes are a paired set of glands that produce sperm. (mountsinai.org)
  • The scrotum hangs outside the body because sperm need to be kept cooler than your internal body temperature of 37C. (spunout.ie)
  • The testes are the primary male reproductive organ and are responsible for testosterone and sperm production. (medscape.com)
  • When it's cold, the scrotum can become wrinkled but when it is warm, the balls hang loose, and the surface of the scrotum is smooth. (spunout.ie)
  • The tunica vaginalis testis is the lower portion of the processus vaginalis and is reflected from the testes on the inner surface of the scrotum, thus forming the visceral and parietal layers. (medscape.com)
  • Most cases of testicular torsion (also called testis torsion ) affect guys who have a condition called a bell clapper deformity . (kidshealth.org)
  • Testicular torsion (also called testis torsion) needs immediate surgery to fix. (childrensdayton.org)
  • In undescended testis there is increased incidence of infertility, torsion, In any community, statistical studies of malignancy and exposure to trauma. (who.int)
  • The testes primarily release testosterone , and the ovaries predominantly dispense estrogen . (wikipedia.org)
  • The scrotum is innervated anteriorly by the ilioinguinal and genitofemoral nerves, while the posterior portion of the scrotum is innervated by the perineal branches of the pudendal nerves. (medscape.com)
  • This last point is relatively important because the posterior elements of the scrotum are innervated by the perineal branches of the pudendal nerve, which are derived from the S2-S4 levels. (medscape.com)
  • Testicular cancer occurs in one or both of the testes, located inside the scrotum. (healthline.com)
  • The cause of this form of cancer is unclear in most cases, but it's understood that testicular cancer forms when healthy cells in the testes become altered and abnormal. (healthline.com)
  • Since the descent of the testes into a scrotal pouch subjects the animal to enhanced risk of accidental damage and/or vulnerability from predators and rivals, presumably there must be some evolutionary adaptive advantage to testicular descent. (wikipedia.org)
  • For their investigation, the researchers used the descent of testes as an example. (mpg.de)
  • However, several African species such as elephants, tenrecs, golden moles, elephant shrews, manatees, and rock hyraxes differ from the other mammals by lacking any descent and having testes at their initial abdominal position. (mpg.de)
  • Normal descent is regulated by androgen hormone levels and a complicated interplay of neurotransmitters and numerous other chemical factors as well as mechanical changes in abdominal pressure and the opening up of a pathway into the scrotum. (sciencebasedmedicine.org)
  • Men who have a balloon-like swelling that extends from the abdomen into the scrotum and cannot be pushed back could have an inguinal hernia that has become trapped (incarcerated). (msdmanuals.com)
  • ABSTRACT This study was carried out to document the prevalence of inguinal hernia, hypospadias, undescended testis and varicocele in 3057 male applicants to the military wing of Mu'ta University in the south of Jordan. (who.int)
  • Prevalence of inguinal hernia and undescended testis were comparable with international prevalence rates, while the rate for hypospadias was higher and that for varicocele lower. (who.int)
  • In the case of true undescended testes, as opposed to absent or retractile testes, there are many possible future complications. (sciencebasedmedicine.org)
  • First off, the presence of a hidden testis or testes can be a clue that something more sinister is going on, in particular when there is a finding of bilateral non-palpable testes. (sciencebasedmedicine.org)
  • Forty-six (88.5%) testes were localised pre-operatively by ultrasound- 20 of 22 (90.9%) palpable testes and 26 of 30 (86.7%) non-palpable testes. (bvsalud.org)
  • Ten percent of cases are bilateral (involve both testes). (choc.org)
  • Bilateral testicular arteries originating from the aorta, just inferior to the renal arteries, provide arterial supply to the testes. (medscape.com)
  • This is the reason why the testes are located in a bag of skin called the scrotal sacs (or scrotum ) that hangs below the body and where the evaporation of secretions from special glands can further reduce the temperature. (wikibooks.org)
  • In almost all adult mammals, testes are located either in a scrotum or in the lower abdomen. (mpg.de)
  • But testes initially develop deep inside the abdomen at a position close to the kidneys, as seen in mammalian embryos. (mpg.de)
  • It can be life threatening, or cause for infertility as it elevates the can lead to loss of the testis or part of the temperature of the testis and this disturbs intestine if strangulation occurs. (who.int)
  • We commonly refer to this finding as cryptorchidism , although by strict definition that term specifically applies to testes that haven't fully completed their epic journey into the scrotum by 4 months of age. (sciencebasedmedicine.org)
  • Cryptorchidism, which is also diagnosed initially when one or both testes is absent, is the most common congenital abnormal finding related to the male genitourinary tract. (sciencebasedmedicine.org)
  • Most cases of cryptorchidism involve undescended but healthy testes. (sciencebasedmedicine.org)
  • Cryptorchidism can be subclassified by the location of the maldescended testis. (bvsalud.org)
  • The testes are embryologically derived from the same level as the kidneys and, therefore, share a common level of innervation, that being the T10-L1 level for pain conduction and T10-L2 for sympathetic innervation. (medscape.com)
  • Testis innervation. (medscape.com)
  • Undescended testes are a condition seen most commonly in newborns when one or both of the male testes have not passed down into the scrotal sac. (choc.org)
  • Undescended testes occur in approximately 3 to 5 percent of male infants. (choc.org)
  • Up to one-third of premature male infants have an undescended testis. (choc.org)
  • The demonstration by researchers that castrated rabbit embryos of both sexes developed as females proved that testes are required for development of the male phenotype in mammals. (medscape.com)
  • It also deals with diseases of the male reproductive organs (prostate, testes, scrotum etc). (spirehealthcare.com)
  • The scrotum has a rich sensory nerve supply that includes the genital branch of the genitofemoral nerve (anterior and lateral scrotal surfaces), the ilioinguinal nerve (anterior scrotal surface), posterior scrotal branches of the perineal nerve (posterior scrotal surface), and the perineal branch of the posterior femoral cutaneous nerve (inferior scrotal surface). (medscape.com)
  • You have pain or swelling in the scrotum. (medlineplus.gov)
  • Swelling can be small and detectable only by carefully feeling the scrotum, or it may be very large and easily visible. (msdmanuals.com)
  • Painless swelling of the scrotum can be caused by generally harmless conditions or can be a sign of cancer. (msdmanuals.com)
  • Cancer of a testis is the most concerning cause of painless scrotal swelling. (msdmanuals.com)
  • But cancer of a testis is the most common solid cancer in men younger than 40 years and it also can occur in younger and older men, so any testicular swelling or lump should be checked by a doctor. (msdmanuals.com)
  • Scrotal Pain Pain in the scrotum (the sac that surrounds and protects the testes) can occur in males of any age, from newborns to older men. (msdmanuals.com)
  • Layers of the scrotum consist of skin, dartos muscle, external spermatic fascia, cremasteric fascia and internal spermatic fascia, which is in close contact with the parietal layer of the tunica vaginalis. (medscape.com)
  • The skin and dartos layers of the scrotum are supplied by the perineal branch of the internal pudendal artery in addition to the external pudendal branches of the femoral artery. (medscape.com)
  • A hydrocele is a disorder in which fluid collects between layers of tissue that surround the testis. (msdmanuals.com)
  • Males whose fathers had undescended testes have a higher rate of undescended testes themselves. (choc.org)
  • Six percent of fathers of males with undescended testis have also had this problem. (cincinnatichildrens.org)
  • Around the 6 th week of the unborn baby's development, a gene on the Y chromosome of a developing boy tells the fetal tissue that will form the sex organs to become the testes. (chkd.org)
  • The veins of the scrotum accompany the arteries, eventually draining into the external pudendal vein and subsequently the greater saphenous vein. (medscape.com)
  • What are the symptoms of undescended testes? (choc.org)
  • Academy of Pediatrics, 5 out of 100 chil- to functional disturbance of the testis and dren have inguinal hernias (more boys than surgical treatment leads to improvement of girls), some may not have symptoms until semen quality [ 11 ]. (who.int)
  • If you have a sudden pain in your scrotum, call a doctor and get to a hospital or doctor's office as soon as you can. (kidshealth.org)
  • A team of researchers from the Max Planck Institute of Molecular Cell Biology and Genetics, the Max Planck Institute for the Physics of Complex Systems, the Senckenberg Natural History Collections Dresden and the Natural History Museum Frankfurt now provide a new approach to resolve the evolution of soft-tissue structures, focusing on the evolution of testes in mammals. (mpg.de)
  • The appendix testis is a small appendage of normal tissue that is usually located on the upper portion of the testis. (chop.edu)
  • Pain is caused when the appendix testis twists and cuts off its own blood supply. (chop.edu)
  • Why is tunica vaginalis present only on anterolateral surface of testes? (freezingblue.com)
  • [ 1 ] Each testis is covered by the tunica vaginalis testis, tunica albuginea, and tunica vasculosa. (medscape.com)
  • Beneath the visceral layer of the tunica vaginalis is the tunica albuginea, which forms a dense covering for the testes. (medscape.com)
  • The most common symptom of undescended testes is the inability to feel the testis during a physical exam. (choc.org)
  • Diagnosis of undescended testes is made based on a complete medical history and physical examination by a specialist. (choc.org)
  • The medical problems are very important as presence of the testis in an obscure place they can determine the size of the problem may lead to delay in diagnosis of malig- and help the health authorities to put ap- nancy. (who.int)
  • scrotum, its just a sac of skin. (urbandictionary.com)
  • Partially or completely concealed beneath the scrotum or excess skin or fat in the pubic area, typically of normal size and function. (luriechildrens.org)
  • The scrotum is usually darker in colour than the rest of the skin, and has hair on it. (spunout.ie)
  • Lymphatic drainage of the skin of the scrotum is by the external pudendal vessels to the medial superficial inguinal lymph nodes. (medscape.com)
  • Additionally, the testes receive blood from the cremasteric branch of the inferior epigastric artery and the artery to the ductus deferens. (medscape.com)
  • [ 1 ] Differentiation of the primitive gonad into testis is controlled by a multitude of genes, beginning with the sex-determining region on the Y chromosome (SRY), which is believed to represent the testis-determining factor. (medscape.com)
  • The scrotum has a seamlike structure called a raphe that runs down the sac and continues to his anal hole, it seperates his testis from banging into each other. (urbandictionary.com)
  • Matériel et Méthode : Il s'agissait d'une étude rétrospective portant sur 13 dossiers de patients qui ont été pris en charge au service d'Urologie-Andrologie l'hôpital Gabriel Touré du Mali pour traumatisme des bourses durant la période allant de Février 2006 à Janvier 2013. (bvsalud.org)
  • Patients and Methods: A prospective evaluation of all boys undergoing operation for undescended testes at the Lagos University Teaching Hospital, Idi-Araba, Lagos, over a 12 month period was performed. (bvsalud.org)
  • PURPOSE: To analyze the histology and distribution of abdominal testicular vessels in human fetuses Patients and Methods: We studied 19 fetuses (34 testes) ranging in age from 12 to 19 weeks post-conception. (bvsalud.org)
  • It's really important, though, to tell a parent or contact a doctor if you have pain in your scrotum. (kidshealth.org)
  • Even if a pain in your scrotum goes away on its own, you still need to tell a parent or doctor. (kidshealth.org)
  • But if you have a son, it's important that he knows to tell you or a doctor if he ever has pain in his private parts, especially in his scrotum or testes. (childrensdayton.org)
  • A scrotal location also exposes the testes to a reduced temperature below that of the body, which has been suggested to reduce the spontaneous rate of germ cell mutations. (wikipedia.org)
  • Infertility, especially if both testes are affected. (choc.org)