Male reproductive anatomy AHS1

Question 1

What is the difference between an open and closed castration?

Answer 1

The vaginal tunic remains intact in a closed castration

Question 2

What are the 3 main things the male repro tract produces?

Answer 2

Spermatozoa
Seminal fluid
Testosterone

Question 3

What is the testes heat exchange system called?`

Answer 3

Pampiniform plexus

Question 4

What makes up the pampiniform plexus?

Answer 4

The highly coiled testicular vein

Question 5

What is the muscle that retracts the testes? What is it part of?

Answer 5

The cremaster muscle

Part of the internal abdominal oblique

Question 6

What is the peritoneum that wraps around the testes called?

Answer 6

The vaginal tunic

Question 7

What are the two layers of the vaginal tunic called?

Answer 7

Parietal and visceral vaginal tunic

Question 8

What is the visceral vaginal tunic closely associated with?

Answer 8

The surface of the testes

Question 9

What is the parietal vaginal tunic closely associated with?

Answer 9

The internal spermatic fascia

Question 10

What is the internal (deep) spermatic fascia like?

Answer 10

Very tough - must cut

Cant separate it from the parietal vaginal tunic

Question 11

What is the external (superficial) spermatic fascia like?

Answer 11

Weak so can easily be blunt dissected

Question 12

What is the muscle that is closely associated with the skin surrounding the testes?

Answer 12

The dartos muscle

Question 13

What are the layers of the tissue surrounding the testes from out to in?

Answer 13

Skin
Dartos muscle
External spermatic fascia 
Internal spermatic fascia
Parietal vaginal tunic
Visceral vaginal tunic
Testes

Question 14

What happens to the cranial gonadal ligament during development?

Answer 14

It degenerates to allow the testes to be pulled caudally

Question 15

What happens to the caudal gonadal ligament?

Answer 15

It becomes the 3 main ligaments of the testes

Question 16

What are the 3 main ligaments of the testes?

Answer 16

Proper ligament of the testis
Ligament of the tail of the epididymis
Scrotal ligament

Question 17

What does the proper ligament of the testes attach between?

Answer 17

Between the testis and the ductus deferens

Question 18

What does the ligament of the tail of the epididymis attach between?

Answer 18

The ductus deferens/testis and the internal spermatic fascia

Question 19

What does the scrotal ligament attach between?

Answer 19

The internal and external spermatic fascia - easy to break down

Question 20

What is the glans part of the canine divided into?

Answer 20

The pars longa glandis and the bulbus glandis

Question 21

What is the pars longa glandis?

Answer 21

The long part of the glans - doesn’t expand as much as the bulbus glandis

Question 22

What is the bulbus glandis?

Answer 22

The bulb of the penis which expands when erect for copulatory lock

Question 23

Where is the corpus spongiosum found?

Answer 23

Surrounding the urethra

Question 24

What is the glans of the canine penis?

Answer 24

Distal expansion of the corpus spongiosum

Question 25

What is the os penis formed from?

Answer 25

The corpus cavernosa

Question 26

What muscles are contracted in the flaccid penis?

Answer 26

Retractor penis muscle and smooth muscle in walls of cavernous spaces

Question 27

What response of the nervous system causes as erection?

Answer 27

Inhibition of the sympathetic tone

Question 28

What compresses venous return?

Answer 28

The urogenital diaphragm - ischiocavernosus, ishiourethralis and bulbospongiosus

Question 29

What key blood vessel is compressed by what muscle of the urogenital diaphragm?

Answer 29

The dorsal vein of the penis is compressed by the ischiourethralis muscle

Question 30

In copulatory lock what muscle from the female constricts which blood vessel of the male?

Answer 30

The constrictor vestibuli/vestibularis muscle of the female constricts the superficial vein of the glans