The Reproduction System (Male)

Question 1

What is the production of sperm called?

Answer 1

Spermatogenesis

Question 2

Where does sperm maturation occur?

Answer 2

Epididymis

Question 3

Name functions of the reproduction tract

Answer 3

1. Produce sperm 2. Secrete male hormones 3. Conduct sperm from the testes into female

Question 4

Function of the testes

Answer 4

Make sperm, hormones

Question 5

Function of epididymis

Answer 5

Storage of sperm, maturation

Question 6

Function of the urethra in the penis

Answer 6

Sperm ejaculation, urinary

Question 7

What are the accessory glands? what are their functions?

Answer 7

Prostate gland and bulbourethral gland, function: secretions

Question 8

What is the gubernaculum?

Answer 8

Short band of inelastic connective tissue that attaches testes to scrotum

Question 9

Through what does the testes go through when coming down from the abdominal wall

Answer 9

The inguinal canal

Question 10

Scrotum function

Answer 10

1. Regulate temperature (keeps 2-6 degrees cooler than body) 2. Supports and protects the testes.

Question 11

What muscles are involved in moving the testes away from the abdomen?

Answer 11

The cremaster muscle (abdomen) and Dartos tunica (lining scrotum). These can contract in cold weather and relax in warm weather.

Question 12

What is the function of the spermatic chord?

Answer 12

Links testis with the rest of the body, tubelike connective tissue

Question 13

What things surround the testes?

Answer 13

The tunic albuginea which is a capsule, and then a thick layer called the parietal vaginal tunic, and then a thinner layer called the visceral vaginal tunic.

Question 14

The testis are divided into lobules which contain cells. What cells do they contain?

Answer 14

Sertoli cells (nurse cells) and Leydig cells (interstitial cells)

Question 15

What are the functions of the Sertoli cells?

Answer 15

Mechanical and nutritional support, produce oestrogen and shield from immune system

Question 16

What are the functions of Leydig cells?

Answer 16

Secretes testosterone, under control of ICHS (interstitial cell stimulating hormone - Ant. Pit.)

Question 17

What is the deferent duct?

Answer 17

Transports sperm from the epididymis to enter the urethra at the neck of the bladder

Question 18

What is a Sertoli cell tumour? symptoms/treatment?

Answer 18

Proliferation of Sertoli cells, symptoms inc. alopecia, inc in mammary gland size, other male dogs may be attracted, Treatment: castration

Question 19

What are the 3 parts of the penis?

Answer 19

1. Roots: crura, connective tissue attach penis to pelvis
2. Body: 2 bundles of erectile tissue
3. Glans: tip, rich supply of sensory nerves

Question 20

What are the 2 types of penis?

Answer 20

Musculocavernous penis and fibroelastic penis

Question 21

What’s a musculocavernous penis?

Answer 21

This type has large spaces which fill up with blood during erection (horse, dog and man)

Question 22

What is a fibroelastic penis?

Answer 22

Contains a lot of fibroelastic tissue and has small spaces which fill up with blood Has an s-shaped sigmoid flexure which straightens out (ruminants and pigs)

Question 23

What parts make up the spermatozoa? function?

Answer 23

1. Head: nucleus, acrosome (digestive enzymes)
2. Midpiece: mitochondria (energy)
3. Tail: propulsion

Question 24

What is spermiogenesis?

Answer 24

Transformation of spermatids to spermatozoa

Question 25

What is capacitation? where does it occur?

Answer 25

It is the last step of sperm maturation, occurs at the isthmus in the oviduct