Head rete testis. Medical search. Frequent questions

Transverse ultrasonogram of the testis shows an enlarged and predominantly hypoechoic epididymis with a reactive hydrocele in a patient with acute epididymitis. (medscape.com)
A spermatocele is a cystic structure found at the rete testis or head of the epididymis. (umich.edu)
An image depicting the testes and epididymis can be seen below. (medscape.com)
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)
The visceral layer of the tunica vaginalis testis is closely applied to the testis, epididymis, and ductus deferens. (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 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 epididymis is a comma-shaped, elongated structure located at the posterior border of the testicle and is divided into the head, tail, and body. (e-ultrasonography.org)
An epididymis lies posterior to each testis. (digitalhistology.org)
Ducts in the epididymis consist of 15-20 efferent ducts (blue arrows) that are coiled into cone shapes in the head of the epididymis. (digitalhistology.org)
Efferent ducts anastomose to form the duct of the epididymis (red arrows), a single, highly coiled tube that fills the remainder of the head and the entirety of the body and tail of the epididymis. (digitalhistology.org)
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)
Sperm is produced in the testes and is conveyed through the ductus deferens, epididymis, urethra, and ejaculatory duct. (healthtian.com)
This very low power image is a sagittal section of a testis , which also includes the head of the epididymis located posterior and partially superior to the testis . (osmosis.org)
(1) Epididymis- It is attached with the back of testis. (biolearners.com)
• Visceral laminae (lamina visceralis) - The visceral laminae covers the tunica albuginea (i.e., it covers the greater part of the testis) and epididymis and connects the epididymis to the testis by means of certain folds. (biolearners.com)
The superior, somewhat swollen part of the epididymis, is called the caput epididymidis or head, and overhangs the superior end of the testis, to which it is directly connected by numerous emerging ducts, by I connective tissue, and by the serous covering of the organ. (co.ma)
The main mass of the epididymis is composed of an irregularly twisted canal, the ductus epididymidis, which forms the first part of the duct of the testis. (co.ma)
Minute sessile, or pedunculated, bodies are often found attached to the head of the epididymis or to the superior end of the testis. (co.ma)
These are called appendices of the epididymis and testis (O.T. hydatids of Morgagni), and have a developmental interest. (co.ma)
Above the head of the epididymis, and in front of the lower part of the spermatic cord, there may also be present a small rudimentary body called the paradidymis. (co.ma)
The cavity within which the testis and epididymis are placed is lined by a smooth serous membrane-the tunica vaginalis-which resembles in appearance and structure the peritoneum, from which it is originally derived. (co.ma)
The tunica vaginalis lines the cavity for the testis, and is reflected from the posterior wall of the scrotal chamber over the testis and epididymis, giving a covering to each. (co.ma)
The part of the membrane lining the cavity is called the lamina parietalis or parietal portion of the tunica vaginalis, while the part clothing the testis and epididymis is termed the lamina visceralis or visceral portion. (co.ma)
of the testis and the body of the epididymis, the visceral part of the tunica vaginalis dips in and lines a narrow interval called the sinus epididymidis (O.T. digital fossa). (co.ma)
The entrance to the sinus is limited above and below by short crescentic folds of the tunica vaginalis, which pass from the testis to the head and tail of the epididymis. (co.ma)
Structure of the Testis and Epididymis. (co.ma)
while the posterior tubules are represented by the ductuli aberrantes , and by the paradidymis , which is sometimes found in front of the spermatic cord above the head of the epididymis. (iiab.me)

Connective tissue, projecting inward from its posterior surface, forms the mediastinum (red oval), through which blood vessels and ducts enter and/or exit the testis. (digitalhistology.org)
Genital ducts transport sperm produced in the testis to the exterior of the body. (digitalhistology.org)
The male genital ducts carry spermatozoa and liquid from the seminiferous tubules in the testes all the way to the penis . (osmosis.org)
The intratesticular ducts include the straight tubules (or tubuli recti), rete testis, and efferent ductules. (osmosis.org)
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)
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 . (iiab.me)

Sperm leaves the straight portions of the seminiferous tubules to enter the rete testis (red arrows) located in the mediastinum of the testis. (digitalhistology.org)
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)
A group of investigators are studying the cells of the seminiferous tubules of the testes . (osmosis.org)
Testis is composed of small, tightly packed tubes called seminiferous tubules , which produce sperm. (osmosis.org)
(4) Seminiferous tubules- They produces sperms in testis. (biolearners.com)
The production of sperms in the testes takes place in a highly coiled structure called the seminiferous tubules. (saralstudy.com)
It takes place in seminiferous tubules present inside the testes. (saralstudy.com)
The primordial germ cells differentiate in the testis, in these seminiferous tubules… But let me first fast forward to the end of the process and describe a complete, mature sperm cell or spermatozoon. (ussromantics.com)
Each testis has around 250 testicular lobules and each of them contains highly coiled seminiferous tubules in which sperms are produced. (careers360.com)

Testis , the ductus deferens , and the seminal vesicles are parts of male reproductive organs . (osmosis.org)
The ductus deferens is a long, muscular tube that carries sperm from the testes to the urethra . (osmosis.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)
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)
Septa (blue arrows) extend between the capsule and the mediastinum, dividing the testis into lobules. (digitalhistology.org)
body of Highmore = mediastinum testis (1651). (edu.au)
This structure receives the name of mediastinum testis, or corpus Highmori, and is traversed by an exceedingly complicated network of fine canals, into which the minute tubules which compose the substance proper of the testis open. (co.ma)

The intermediate part, I the body, or corpus epididymidis, is applied against, but is separated from, the posterior part of the lateral surface of the testis by an involution of the serous covering of the organ, which forms an intervening pocket termed the sinus epididymidis (O.T. digital fossa). (co.ma)

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 epididymal head overhangs the superior pole of the testicle and is isoechoic or slightly hyperechoic to the adjacent testicular tissue. (e-ultrasonography.org)
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)

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 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)
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)
The Scrotum and Testes. (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)
Situated outside the abdominal cavity in a pouch called the scrotum, which helps in maintaining the low temperature of testes necessary for the process called spermatogenesis. (careers360.com)

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)
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)
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)
Testes , or testis when singular, is responsible for the production of sperm , which is called spermatogenesis . (osmosis.org)
FSH acts on sertoli cells, whereas LH acts on leydig cells of the testis and stimulates the process of spermatogenesis. (saralstudy.com)
I'm talking about genes, DNA, genetic recombination and all that we know about meiosis and mitosis, spermatogenesis and oogenesis, genomics and epigenetics, mitochondrial DNA, ribosomes, mRNA, proteins and the like, none of which I'm particularly knowledgeable about - but surely even what I know about it all would make Darwin's head explode. (ussromantics.com)

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)

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)
attached to the posterior border of the testis. (co.ma)
round the posterior border of the testis and overlaps to some extent the posterior part of the lateral surface of that organ. (co.ma)
The sac, or cavity, tapers as it is traced upwards, and above the level of the testis the funiculus spermaticus or spermatic cord bulges forwards into its posterior part. (co.ma)
All the septa end posteriorly in a mass of fibrous tissue which is directly continuous with the tunica albuginea, and which projects forwards into the testis along its posterior border. (co.ma)

The gonadal ridge from which either the ovary or testis is formed * ug. (iiab.me)

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)

Deep to the tunica vaginalis, the tunica albuginea is a tough, fibrous outer covering of the testis. (medscape.com)
Beneath the serous tunica vaginalis the testis is invested by an external coat, composed of dense white inelastic fibrous tissue called the tunica albuginea, from the deep surface of which a number of slender fibrous bands or septa dip into the gland. (co.ma)

It is fibro-elastic and has a sigmoid flexure and a rounded, laterally flattened head of the penis (glans penis) with an attached urethral process. (scielo.org.za)
Its work is to stores and transports the sperm from the testes to the outside through urethra that originates from the urinary bladder and extends through the penis to its external opening called as urethral meatus. (careers360.com)

The testis (from the Greek word orchis ) is the male gland important for both reproductive (exocrine) and endocrine functions. (medscape.com)
Been encouraged to refrain from ejaculation of the rete testes urinary bladder prostate gland and adrenal vein. (ben.edu)
Owing to an obliquity of the long axis of the gland, the superior extremity of the testis lies on a more anterior and lateral plane than the inferior extremity. (co.ma)
The cavity is considerably larger than the contained structures, and extends not only down to a lower level than the testis, but also reaches upwards to a higher level than the gland. (co.ma)

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)

It is a long highly coiled tube and acts as a passage for spermatozoa from the testis. (biolearners.com)
• Spermatozoa (sperm)- The spermatozoa is male gametes which are produced by the testis. (biolearners.com)

Testes , or testis when singular, is an organ in the male reproductive system that produces sperm and male hormones. (osmosis.org)
The testes (singular = testis) are the male gonads -that is, the male reproductive organs. (bccampus.ca)

Generally they are in pairs (two testicles) and they called as testis. (biolearners.com)

• Parietal laminae (lamina parietalis) - The parietal lamina is much more extensive than that of the visceral laminae as it extends upward for some distance in front and some more on the medial side of the cord then reaches below the testis. (biolearners.com)

At the end of spermiogenesis, the mature sperm is formed of head, neck, and tail and surrounded by the cell membrane. (online-sciences.com)

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)
The inferior and smaller end is termed the cauda epididymidis or tail, and is attached by loose areolar tissue and by the serous covering to the inferior end of the testis. (co.ma)

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)

In the latter case, the heat exchange is used to reduce the temperature of the testes. (pandasthumb.org)
It exchanges heat, ions, or gases between vessel walls so that the two bloodstreams within the rete maintain a gradient with respect to temperature, or concentration of gases or solutes. (pandasthumb.org)
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)

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)
The testes also produce sex hormones , mainly testosterone . (osmosis.org)

Germ cell neoplasia-in-situ with pagetoid involvement of rete testis was seen. (webpathology.com)
Sertoli cells are known as nurse cells of the testes as they provide nourishment to the germ cells. (saralstudy.com)

Each border ends above in the superior extremity, and below in the inferior extremity of the testis. (co.ma)

Testis secretions promote the masculinisation of the internal and external male genitalia. (scielo.org.za)
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, Interstitial cell - Vacuolation in a male FVB/N transgenic mouse from a chronic study. (nih.gov)

Tangential sections through these areas or along deep portions of rete ridges can simulate invasion. (webpathology.com)

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)

At the head we find the acrosome and the tightly packed nucleus. (ussromantics.com)

These the septula testis-imperfectly divide the organ into a number of wedge-shaped parts called lobuli testis (Fig. 1005). (co.ma)

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)

In development, the nose opening shifts from the tip of the snout (arrow in left embryo) to its position on top of the head. (pandasthumb.org)

The genetic material of the father predominantly determines whether the gonads will be testes or ovaries. (healthtian.com)

Functional rete testis descends within the lymph follicles, to protoplasm. (ontopofmusic.com)

The testis is surrounded by a dense connective tissue capsule, the tunica albuginea (black arrows). (digitalhistology.org)

On ultrasonography, the capsule is seen as a thin echogenic band outlining the testis. (e-ultrasonography.org)
Surrounding each testis is a thick capsule of connective tissue, called the tunica albuginea. (osmosis.org)

Epididymis28

Ducts6

Seminiferous9

Ductus deferens2

Mediastinum6

Surface of the testis1

Testicular3

Scrotum13

Spermatogenesis6

Right testis2

Posterior5

Ovary1

Abdominal4

Tunica vaginalis2

Penis2

Gland4

Visceral layer1

Spermatozoa2

Singular2

Testicles1

Parietal1

Sperm is formed1

Tail2

Reproductive1

Temperature3

Testosterone3

Germ2

Inferior1

Male3

Portions1

Chromosome2

Tightly packed1

Organ1

Anterior1

Embryo1

Predominantly1

Functional1

Dense1

Capsule2