The tunica vaginalis testis (a remnant of the processus vaginalis) envelopes the testis in a double layer, except at the superior and posterior borders where the spermatic cord and epididymis adhere to the testes. (medscape.com)
On the posterolateral surface of the testis, this layer invests a slit-like recess between the body of the epididymis and the testis that is called the sinus of epididymis. (medscape.com)
The epididymis is a comma shaped, elongated structure composed of a single, fine tubular structure estimated up to 6 meters (approximately 20 feet) in length. (medscape.com)
The epididymal head overhangs the upper pole of the testis, receives the seminal fluid from the ducts of the testis (which pierce the upper portion of the mediastinum), then allows the passage of the sperm into the distal portion of the epididymis. (medscape.com)
The testes are ovoid (10 cm - 14 cm × 6 cm - 8 cm without the epididymis) and suspended into the scrotum with a vertical long axis. (scielo.org.za)
In the presence of a Y chromosome and the SRY gene, müllerian‐inhibiting substance produced by Sertoli cells causes regression of the MD. Meanwhile, testosterone produced by the Leydig cells induces differentiation of the WD into the efferent ducts that communicate with the rete testis, followed by the epididymis, ductus deferens, seminal vesicle, and ejaculatory duct. (esur2023.com)
Ectasia4
Rete tubular ectasia , also known as cystic transformation of rete testis is a benign condition, usually found in older men, involving numerous small, tubular cystic structures within the rete testis. (wikipedia.org)
Another distinguishing feature is that tubular ectasia of the testes are confined only to the mediastinum, unlike testicular cancer such as cystic teratoma of testis which spreads throughout the testis. (wikipedia.org)
Elon Musk got his Disney on over the weekend, laying out a vision for Tesla charging stations Epididymal cysts may be observed permanent association with tubular ectasia of the rete testis. (tiswork.jp)
Right testis2
Superiorly, it is suspended by the spermatic cord, with the left testis often sitting lower than the right testis. (medscape.com)
The right testis was situated more cranially than the left and connected to a longer deferent duct with normal ampullae. (scielo.org.za)
Testicular3
Testicular biopsy is indicated in azoospermic men with a normal-sized testis and normal findings on hormonal studies to evaluate for ductal obstruction, to further evaluate idiopathic infertility, and to retrieve sperm. (medscape.com)
The scrotum is swelling of the perineum and holds some abdominal tissues into its cavity including the testicular vein and artery, and the pampiniform plexus (which forms the principal mass of the spermatic cord, it also functions in venous return from the testes, the pampiniform plexus also plays a vital role in regulating the temperature of the testes. (healthtian.com)
Disorders of sexual development (DSD), formerly termed 'intersex', are congenital abnormalities in the development of chromosomal (abnormalities in XX or XY sex chromosome number or structure), gonadal (testicular, ovarian and ovotesticular DSD, previously termed true hermaphrodite, or dysgenesis) or phenotypic (male or female with abnormalities of tubular and external genitalia) sex. (scielo.org.za)
Mediastinum testis3
Cystic lesions us usually found at the mediastinum testis with elongated shaped lesion displacing the mediastinum. (wikipedia.org)
On the posterior surface, it is reflected inwardly to form an incomplete vertical septum called the mediastinum testis. (medscape.com)
The mediastinum testis extends from the superior to near the inferior portion of the gland. (medscape.com)
Scrotum12
The scrotum is an anatomical male reproductive organ that has a double hanging sack of skin and a smooth muscle One testis generally hangs lower than the other to avoid getting squashed in the occurrence of impact. (healthtian.com)
Over the last 3 months of gestation, the testis must course its way down from its original retroperitoneal position to its final destination in the scrotum. (medscape.com)
The testis is a paired, ovoid male reproductive organ that sits in the scrotum, separated from its mate by a scrotal septum. (medscape.com)
Inferiorly, the testis is anchored to the scrotum by the scrotal ligament, a remnant of the gubernaculum. (medscape.com)
Cryptorchidism is a condition whereby one or both testes and the associated structures are absent in the scrotum because of a failure of the testes to descend from the pre-natal abdominal position. (scielo.org.za)
The testes are located in a skin-covered, highly pigmented, muscular sack called the scrotum that extends from the body behind the penis (see Figure 1 ). (bccampus.ca)
It continues internally to make up the scrotal septum, a wall that divides the scrotum into two compartments, each housing one testis. (bccampus.ca)
By contracting simultaneously, the dartos and cremaster muscles can elevate the testes in cold weather (or water), moving the testes closer to the body and decreasing the surface area of the scrotum to retain heat. (bccampus.ca)
Alternatively, as the environmental temperature increases, the scrotum relaxes, moving the testes farther from the body core and increasing scrotal surface area, which promotes heat loss. (bccampus.ca)
This anterior view shows the structures of the scrotum and testes. (bccampus.ca)
Paired ovals, the testes are each approximately 4 to 5 cm in length and are housed within the scrotum (see Figure 2 ). (bccampus.ca)
Abdominal7
Each arises on the lateral aspect of the corresponding mesonephric duct as a tubular invagination of the cells lining the abdominal cavity. (wikipedia.org)
The ostium of the fallopian tube remains from the anterior extremity of the original tubular invagination from the abdominal cavity. (wikipedia.org)
Spermatogenesis is also depressed at lower temperatures than 32 °C. For this reason, the dartos muscle contracts in cold weather to draw the testes upwards (in order to be warmed by the abdominal temperature). (online-sciences.com)
The testes were intra-abdominal, smaller and less ovoid than in normal male giraffes. (scielo.org.za)
The descent of testis includes three phases: abdominal testis translocation, transinguinal testis migration and inguinoscrotal testis migration. (scielo.org.za)
Abdominal testis translocation is dependent on INSL3 and only partially on testosterone, although the inguinoscrotal migration is androgen reliant (Amann & Veeramachaneni 2007). (scielo.org.za)
Descending from the internal oblique muscle of the abdominal wall are the two cremaster muscles, which cover each testis like a muscular net. (bccampus.ca)
Sertoli3
This is due to the production of Anti-Müllerian hormone by the Sertoli cells of the testes. (wikipedia.org)
All cases presented congestion, interstitial edema, thickening of the tubular basal membrane, decreased Leydig and Sertoli cells with reduced spermatogenesis, and strong expression of vascular cell adhesion molecule (VCAM) in vessels. (bvsalud.org)
EM detected viral particles in the cytoplasm of fibroblasts, endothelium, Sertoli and Leydig cells, spermatids, and epithelial cells of the rete testis in four cases, while RT-PCR detected SARS-CoV-2 RNA in three cases. (bvsalud.org)
Ovary3
At this stage, and for approximately two days, it is not possible either histologically or morphologically to recognise whether the future gonad is destined to give rise to a testis , or to an ovary . (atlas-d2k.org)
Despite the presence of the primordial germ cells in the developing gonads, there is still no clear evidence seen of the differentiation of the future gonad, either histologically or morphologically, in the direction of maleness (to form a testis ) or femaleness (to form an ovary ). (atlas-d2k.org)
The gonadal ridge from which either the ovary or testis is formed * ug. (iiab.me)
Visceral layer1
The visceral layer lines the tunica albuginea of the testis and is separated from the parietal layer that lines the inner aspect of the scrotal wall by a small amount of fluid-containing interspace. (e-ultrasonography.org)
Testosterone2
As the fetus develops, the functioning testis produces the male hormone testosterone to allow development of male genitalia. (medscape.com)
Anti-Mullerian hormone (Mullerian inhibiting substance) causes regression of the paramesonephric duct (Mullerian duct, which forms the female internal genitalia in XX animals), although testosterone drives the development of the male tubular tract, accessory glands and external genitalia, and together with insulin-like factor 3 (INSL3) the descent of the testes. (scielo.org.za)
Reproductive tract1
M. A. Kutzler and Hofmaster, I. L. , " Aplasia of the tubular reproductive tract in a mare " , Journal of American Vet Medicine Association , 2007. (oregonstate.edu)
Deep to the tunica vaginalis, the tunica albuginea is a tough, fibrous outer covering of the testis. (medscape.com)
Glands1
The structures of the male reproductive system include the testes, the epididymides, the penis, and the ducts and glands that produce and carry semen. (bccampus.ca)
Bilateral1
It is usually found in men older than 55 years and is frequently found on bilateral testes but often asymmetrical. (wikipedia.org)
Lesion1
Lesion of the female vulva characterized by thinning of the epidermis and disappearance of rete pegs, hydropic degeneration of basal cells, superficial hyperkeratosis, dermal fibrosis with scant perivascular, mononuclear inflammatory cell infiltrate. (brainscape.com)
Cysts1
The condition shares a common location with cystic dysplasia of the testis and intratesticular cysts. (wikipedia.org)
Adult1
Described by some as being shaped and sized like a large olive or small plum, the average volume of the adult testis is approximately 25 mL. (medscape.com)
Wolffian1
The ureter arises as a tubular diverticulum from the Wolffian duct close to the point here the latter joins the cloaca (Figs. 1039 and 1042). (co.ma)
Chromosome2
Transcription of the SRY gene (testis-determining factor region) on the Y chromosome ultimately leads to sex differentiation. (medscape.com)
In XY males, the activation of the sex-determining region Y chromosome gene (SRY) initiates testis development. (scielo.org.za)
Gland1
The testis (from the Greek word orchis ) is the male gland important for both reproductive (exocrine) and endocrine functions. (medscape.com)
Sperm4
The testis has two primary functions: to supply sperm by meiotic division of sperm cells within the seminiferous tubules and to synthesize and secrete androgens that regulate the male reproductive processes. (healthtian.com)
Based on this current study, it was evident that aluminum chloride induced oxidative stress and retarded reproduction in males whereas Ananas comosus mitigated reproduction in males by improving sperm parameters and microarchitecture of the testes. (springeropen.com)
The paired testes are a crucial component in this process, as they produce both sperm and androgens, the hormones that support male reproductive physiology. (bccampus.ca)
This location is important in sperm production, which occurs within the testes, and proceeds more efficiently when the testes are kept 2 to 4°C below core body temperature. (bccampus.ca)
Findings1
OBJECTIVE: To describe the pathological findings in testes from fatal cases of COVID-19, including the detection of viral particles and antigens, and inflammatory cell subsets. (bvsalud.org)
Epididymal1
The epididymal body and tail are located behind and along the inferior pole of the testicle and are usually isoechoic to the testis. (e-ultrasonography.org)
Male5
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)
In the development of an embryo, after the testes are developed, it will produce and emit male sex hormones during late embryonic development which will result in the production of the male secondary sex organs of the child. (healthtian.com)
Testis secretions promote the masculinisation of the internal and external male genitalia. (scielo.org.za)
portion of it, however, is retained in the male, and forms the excretory apparatus of e testis. (co.ma)
The testes (singular = testis) are the male gonads -that is, the male reproductive organs. (bccampus.ca)
Internal1
In males, the establishment of internal reproductive system involves two key events: the formation of the testis and the maintenance and differentiation of the WD. (esur2023.com)
Spermatogonia1
Growth hormone and most of the other hormones: For controlling metabolic functions of the testes, GH specifically promotes early division of the spermatogonia, In its absence, spermatogenesis is severely deficient or entirely absent. (online-sciences.com)
Anterior1
Smooth to palpation, the testis sits obliquely with its long axis mostly vertical with a slight anterior and lateral slant to the superior pole. (medscape.com)
Small1
The small intestine is a tubular organ lined with this type of tissue. (wikidoc.org)
Cells1
Electron microscopic and cytochemical study of the vacuoles of regenerating renal tubular cells. (nih.gov)
Numerous1
These divide the interior of the testis into numerous, cone-shaped spaces that have a wide base at the gland's surface and narrow as they converge to the mediastinum. (medscape.com)
Head1
Located on the posterior border of the testis, it is composed of 3 parts, including the head (caput), body (corpora), and tail (cauda). (medscape.com)
Treatment1
This decreases the local androgen concentration in the testes resulting in depression or spermatogenesis, so treatment with exogenous androgens can be used as a method of contraception in males. (online-sciences.com)