Male Repro

Question 1

Testicles descend into the scrotum through what area?

Answer 1

The inguinal canal

Question 2

What is the role of the epididymis?

Answer 2

Creates a concentrated sperm fraction

Question 3

What is a vasectomy?

Answer 3

Cut ductus deferens so they are not able to reproduce but the secondary sex characteristics will remain intact

Question 4

Name the layers of the scrotum from external to internal.

Answer 4

Skin (epidermis and dermis)
Tunica Dartos
External spermatic fascia
Internal Spermatic Fascia
Parietal vaginal tunic
Visceral vaginal tunic

Question 5

Where does the cremaster muscle originate?

Answer 5

Caudal free border of the internal abdominal oblique m.

Question 6

Where does the cremaster muscle insert?

Answer 6

Spermatic fascia and parietal vaginal tunic

Question 7

What is the action of the cremaster muscle?

Answer 7

Acts to pull the testis closer to the body in response to the cremasteric reflex

Question 8

What nerve innervates the cremaster muscle?

Answer 8

the genitofemoral nerve

Question 9

List all of the components of the spermatic cord (7 structures).

Answer 9

Testicular artery
Testicular vein and pampiniform plexus
Testicular nerve
Testicular lymphatics
Ductus deferens
Deferent artery and vein (artery and vein of the ductus deferens)
Internal cremaster muscle (smooth muscle)

Question 10

List the functions of the prostate (4 functions)

Answer 10

1) adds volume to ejaculate to provide a vehicle for sperm
2) provides a source of energy for sperm
3) acts as a buffer system for sperm by neutralizing the pH in the urine and the CO2 produced by sperm
4) Production of prostaglandins that cause smooth muscle to contract in the female repro tract

Question 11

What are the two parts of the male canine urethra?

Answer 11

Pelvic part
Penile part (spongy)

Question 12

What are the 4 erectile tissues of the penis?

Answer 12

Corpus cavernosum penis
Corpus spongiosum penis
Corpus spongiosum glandis of the bulbus penis
Corpus spongiosum glandis of the pars longa glandis

Question 13

The cura is composed of what two parts and what muscle is it surrounded by?

Answer 13

Corpus cavernosum penis and tunica albuguinea
Ischiocavernosus m.

Question 14

What muscle surrounds the bulb of the penis?

Answer 14

Bulbospongious m

Question 15

What are the three muscles associated with the canine penis?

Answer 15

Bulbospongious muscle (around the bulb of the penis)
Ischiocavernosus muscle (From ischiatic tuberosities to the crura of the penis)
Retractory penis muscle (From the external anal sphincter to the gland, caudal and ventral position)

Question 16

What is the name of the bone in the penis?

Answer 16

Os penis

Question 17

What is the muscle that keeps the penis inside the prepuce?

Answer 17

Retractor penis muscle

Question 18

Erection is a _____________ function and ejaculation is a _____________ function.

Answer 18

parasympathetic function
sympathetic function

Question 19

The scrotum of the cat is in the ___________ position and the scrotum of the dog is in the ___________ position.

Answer 19

perineal position
inguinal position

Question 20

What are the two accessory sex glands in a male cat?

Answer 20

Prostate
Bulbourethral glands

Question 21

What is the purpose of the keratinized spines on the glans penis of the cat?

Answer 21

Cats are induced ovulators, the spines trigger ovulation once they are in the vagina of the female

Question 22

Label the diagram

Answer 22

1) Glans
2) Body
3) Root

Question 23

Label the diagram

Answer 23

1) Retractor penis mm.
2) Ischiocavernosus mm.
3) Bulbospongious m.

Question 24

Label the diagram

Answer 24

1) Ventral perineal a. (And vein)
2) Artery is the bulb (and vein)
3) Deep a. Of the penis (and vein)
4) Dorsal a. Of the penis (and vein)
5) Artery of the penis (and vein)
6) Internal pudendal a. (And vein)

Question 25

Label the diagram

Answer 25

Tunica albuguinea
Bulbous gland is
Os penis
Penile Urethra
Corpus spongiosum
Retractor penis muscle