Testis

Question 1

The testicles are paired organs within the scrotum that have reproductive and endocrine functions. It is common for the right/left testis to hang lower than the right/leftin approximately___%of men. The dimensions of the normal testis include a length of_ to _ cm, a width of _ cm, and a depth of __ cm; the testis normally has a volume of ___to __ mL.

Answer 1

The testicles are paired organs within the scrotum that have reproductive and endocrine functions. It is common for the right testis to hang lower than the left in approximately 85% of men. The dimensions of the normal testis include a length of 4 to 5 cm, a width of 3 cm, and a depth of 2.5 cm; the testis normally has a volume of 15 to 25 mL.

Question 2

There is a small, pedunculated or sessile body at the upper pole of the testis, which is known as the ____

*derived from?

Answer 2

Appendix TEstis

Mullerian duct

Question 3

A tough capsule envelops the testis, composed from external to internal of the ___ ,the ___, and the ___, before reaching the parenchyma of the testis.

The tunica albuginea is composed of __ cells that pass through collagenous tissue. It is believed that these smooth muscle cells provide the testicular capsule with some ___ and may affect arterial flow into the testis. They may also promote the ____ on its way out of the testis

The testis attaches to the epididymis on the ___ aspect of the testis

Answer 3

A tough capsule envelops the testis, composed from external to internal of the visceral tunica vaginalis, the tunica albuginea, and the tunica vasculosa, before reaching the parenchyma of the testis.

The tunica albuginea is composed of smooth muscle cells that pass through collagenous tissue. It is believed that these smooth muscle cells provide the testicular capsule with some ability to contract and may affect arterial flow into the testis. They may also promote the flow of seminiferous tubule fluid on its way out of the testis

The testis attaches to the epididymis on the posterolateral aspect of the testis

Question 4

Three arterial supplies to the testis:

Components of pampiniform plexus

Answer 4

Three arterial supplies to the testis:

1. TEsticular artery, artery of the vas deferens, cremasteric

*main is testicular

Components of pampiniform plexus:

1. veins from the mediastinum testis
2. Veins from the SURFACE of testis
3. DEFERENTIAL veins

Question 5

Considerations for testiscular biopsy / traction

* rationale

Answer 5

Upper pole of testis –> anterior and medial

Lower pole of testis –> Lateral

midlle of testis has fever vessels

*rationale : arterial anastomosis occurs at the head of the epidiyms and theil of the epidydymis

Question 6

lymphatic drainage

Answer 6

para-aortic and interaorocaval nodes

Question 7

Nerve supply

T/F: TEstis does not have somatic innervation

What supplies the parietal and visceral tunica vaginalis and the overlying scrotum

Answer 7

renal and aortic plexuses

True

GFN