Scrotum and Testis

Why does the scrotum have skin with little or no fat?

Maintain temperature below body temperature

What does the scrotum contain?

Testes

Epididymis

Lower part of spermatic cord

What layer of the scrotum corresponds with the subcutaneous tissue, superficial and deep fascia of the anterior abdominal wall?

Dartos muscle

T/F: The dartos muscle is made of smooth muscle.

True

T/F: There is no continuation of the transversus abdominis in the scrotum.

True

What layers of the anterior abdominal wall have no continuation in the scrotum?

Transversus abdominis

Extraperitoneal fascia

What is the function of the dartos muscle?

Temperature regulation

What is the name for accumulation of fluid in cavity of tunica vaginalis?

Hydrocele

What layer of the tunica vaginalis is superficial and lies internal to the internal spermatic fascia?

Parietal layer

What layer of the tunica vaginalis is deep and firmly adherent to the testis and epididymus?

Visceral layer

What are the functions of the testis?

Production of spermatozoa

Secretion of androgens

What is the name for the fibrous outer covering of the testis that lies deep to the visceral layer of the tunica vaginalis, which is the deepest layer of the scrotum?

Tunica albuginea

What is the order of structures that sperm pass through?

1. Seminiferous tubules

2. Straight tubules

   1. Rete testes

What is the name for the fibrous compartment in the posterior part of the testis where the septa converge?

Mediastinum testis

What is the functional, sperm-producing portion of the testis?

Seminiferous tubules

What is the name for the elaborate network of canals located within the mediastinum testis into which the straight tubules empty?

Rete testis

What ducts connect the rete testis to the head of the epididymis?

Efferent ductules

What is the C-shaped structure attached to the superior and posterior aspect of the testis?

Epididymis

What is the function of the epididymis?

Store sperm until they mature

What are the three parts of the epididymis?

Head, body, and tail

What part of the epididymis is connected to the superior surface of the testis by the efferent ductules?

Head

What part of the epididymis is located along the superior surface of the testis?

Body

What part of the epididymis ends in the ductus deferens?

Tail

Where do the testis drain into?

Lumbar lymph nodes

Where does the scrotum drain into?

Superficial inguinal nodes

Where do the testes develop?

Lumbar region inside abdominal cavity

What is the ligament present in the fetus which connects the testis to the scrotum?

Gubernaculum testis

What contracts to pull the testis downward and through the inguinal canal during its descent?

Gubernaculum testis

What is a remnant of the gubernaculum testis?

Scrotal ligament

What is the term for undescended testes at birth?

Cryptorchidism

In cryptorchidism, where are the undescended testes most commonly found?

Inguinal canal

T/F: Cryptorchidism is usually bilateral.

False - unilateral

What is used to treat cryptorchidism?

Administration of testosterone