Where is the mediastinum of testis?
The mediastinum testis is a network of fibrous connective tissue that extends from the top to near the bottom of each testis. It is wider above than below.
Is the rete testis the mediastinum?
The rete testis (/ˈriːti ˈtɛstɪs/ REE-tee TES-tis) is an anastomosing network of delicate tubules located in the hilum of the testicle (mediastinum testis) that carries sperm from the seminiferous tubules to the efferent ducts. It is the counterpart of the rete ovarii in females.
How is mediastinum testis formed?
Description. The tunica albuginea is reflected into the interior of the testis, forming an incomplete vertical septum, called the mediastinum testis (corpus Highmori).
What is the sonographic feature of the mediastinum testis?
The tunica albuginea extends into the posteromedial testis to form the mediastinum testis (Fig. 2), which contains ducts, nerves and blood vessels. The mediastinum is usually seen on ultrasonography as a thin echogenic band.
What is the structure of a testis?
Each testicle is covered by tough, fibrous layers of tissue called the tunica. The outer layer is called the tunica vaginalis and the inner layer is called the tunica albuginea. The testicle is divided into parts called lobules. Each lobule contains tiny U-shaped tubes called seminiferous tubules.
Where is the mediastinum located and what is its function?
The mediastinum is an important region of the body located between the lungs. Structures that lie in this region include the heart, the esophagus, the trachea, and large blood vessels including the aorta. The mediastinum is also home to lymph nodes.
What structure is in the mediastinum?
The mediastinum houses many vital structures including the heart, great vessels, trachea, and essential nerves. It also functions as a protected pathway for structures traversing from the neck, superiorly, and into the abdomen, inferiorly.
What are the three coverings of the testes?
There are three layers to the tunica, the tunica vasculosa, tunica albuginea and tunica vaginalis. The tunica vasculosa is the inner layer of the tunica and consists of blood vessels and connective tissue. It is covered by the tunica albuginea and facilitates blood supply to the testes.
What does gubernaculum become in men?
Males. The upper part of the gubernaculum degenerates. The lower part persists as the gubernaculum testis (“scrotal ligament”). This ligament secures the testis to the most inferior portion of the scrotum, tethering it in place and limiting the degree to which the testis can move within the scrotum.
What is found in the mediastinum?
What is the Gubernaculum testis?
Caudally the genito-inguinal ligament, or ‘gubernaculum’, connects the lower pole of the gonad and epididymis to the future inguinal canal. The gubernaculum was so-named by John Hunter in the eighteenth century because he thought that it steered the testis to the scrotum.
What is the anatomy of the testis?
The testes are paired ovoid structures that are housed in the scrotum and positioned so that the long axis is vertical. The testicle is covered by the tunica vaginalis. Beneath the tunica vaginalis is the capsule of the testis, termed the tunica albuginea. See Male Reproductive Organ Anatomy.
What is gubernaculum function?
A. A gelatinous tissue, the gubernaculum, pulls the testes through the abdomen, through the inguinal canal in the groin, and down into the scrotum. The pulling action occurs as the gubernaculum is stimulated first to grow and then to shrink.
Where are the mediastinum testes located?
The mediastinum testes, a fibrous extension of the tunica albuginea that extends along the long axis of the testis, is present in the center of the normal testicle.
What is the function of the mediastinum?
The mediastinum supports the rete testis and blood vessels of the testis in their passage to and from the substance of the gland. Transverse section through the left side of the scrotum and the left testis.
What is the tunica vaginalis and mediastinum?
Tunica vaginalis (visceral lamina), and 12. Cavity of tunica vaginalis. The mediastinum testis is a network of fibrous connective tissue that extends from the top to near the bottom of each testis. It is wider above than below.
Is the epididymis connected to the testis?
On the dorsolateral aspect of each testis there is a series of convoluted tubules called the epididymis. The mediastinum testis is a sheet of connective tissue that runs through the center of each organ. The testis is covered by the tunica vaginalis, which is continuous with the abdominal peritoneum.