L41: Perineum II

Question 1

What two things does the testes produce?

Answer 1

• Sperm

- Hormones

Question 2

Describe location of testes in the following species: ruminants, horse/dog, pig/cat

Answer 2

Ruminants: inguinal
Horse and dog: intermediate
Pig and cat: perianal

Question 3

Blood supply (2) and innervation of the testes (3).

Answer 3

Blood supply: testicular a, testicular vein

Innervation: Vagus n, pelvic plexus, caudal mesenteric plexus

Question 4

What is the function of the epididymis?

Answer 4

Matures (head and body) and stores sperm (tail)

Question 5

What three structures make up the epididymis?

Answer 5

Head (caput)
Body (corpus)
Tail (cauda)

Question 6

The body of the epididymis is always located at the ____side of the testis

Answer 6

Lateral

Question 7

What is the innervation and action of the cremaster muscle of the scrotum?

Answer 7

Innervation: genital branch of urogenital n
Action: Raise testes during cold weather, arousal, copulation and fighting

Question 8

What is the innervation (4) and blood supply of the scrotum?

Answer 8

Blood supply: External pudendal a

Innervation: Lumbar nerves (ventral branches), iliohypogastric n, ilioinguinal n, genitofemoral n

Question 9

What are the 4 anatomical structures involved in testis thermoregulation?

Answer 9

1 Pampiniform plexus
2 Thin scrotal skin
3 Dartos
4 Cremaster

Question 10

While steroidogenesis is not sensitive to temperature, ____to occur needs the tests to be at 2-5 C below body temp

Answer 10

Spermatogenesis

Question 11

4 rationale of castration?

Answer 11

1 To avoid repro
2 To facilitate management
3 To promote weight gain
4 To improve meat quality