11.1 - The Male Reproductive System

Question 1

What are paired ovoid structures which are compressed laterally?
• They lie in their own compartment in the scrotum, suspended by their own ductus deferens.

Answer 1

Testes

Question 2

The blood supply of the testes is derived from what artery? which is a branch of the abdominal aorta.

Answer 2

testicular artery

Question 3

Which animal testes has a long axis of testicle is nearly vertical; near the sigmoid flexure of the penis so that the scrotum is dorsoventrally elongate and pendulous.

Answer 3

BULL/RAM

Question 4

Which animal testes has long axis of testicle is nearly horizontal; held close to the abdominal wall near the superficial inguinal ring.

Answer 4

HORSE

Question 5

Which animal testes is small and oval shape. Long axis is oblique.

Answer 5

DOG

Question 6

Which animal testes is Testes is caudal to the sigmoid flexure of the penis just ventral to the anus, a position describes as perineal, the long axis is directed upwards and backwards (oblique)

Answer 6

PIG

Question 7

What is a two-lobed sac that contains and protects the two testicles?
• It also regulates the temperature of the testicles, maintaining them at a temperature lower than body temperature.
• Functions as a heat regulating mechanism.

Answer 7

scrotum

Question 9

2 to 5 degrees below body temp is essential for what growth and maturation?

Answer 9

spermatogenesis

Question 10

What acts as the countercurrent heat exchange?

Answer 10

Pampiniform plexus

Question 11

What lies along the attached border of the testis? It has the following features:-
• A head
• A body
• A tail

Answer 11

epididymis

Question 12

epididymis tail is continued by the?

Answer 12

ductus deferens

Question 13

What structure attaches the tail of the epididymis to the caudal extremity of the testis?

Answer 13

Ligament of epididymis

Question 14

What houses the spermatozoa as they mature before they are expelled by ejaculation?

Answer 14

epididymis

Question 15

Function of?
• As a transport;
• As storage;
• As a site of maturation for the spermatozoa.

Answer 15

Epididymis

Question 16

What are immature when they leave the testes and must undergo a period of maturation (usually 10-15 days) within the epididymis before they are capable of fertilizing the ova

Answer 16

Spermatozoa

Question 17

Spermatozoa are immature when they leave the testes and must undergo a period of maturation (usually how many days?) within the epididymis before they are capable of fertilizing the ova

Answer 17

10-15 days

Question 18

The pyramidal spaces marked off by the septa which divide the testis into lobules contains the?

Answer 18

Seminiferous tubules

Question 19

These tubules enter the head of the epididymis after the rete testis.

Answer 19

Efferent tubules

Question 20

This duct leaves the tail of the epididymis and continues the pathway of sperm.

Answer 20

Epididymic duct

Question 21

What is a muscular tube which extends from the tail of the epididymis to the pelvic urethra?

Answer 21

ductus deferens

Question 22

In the region of the bladder it dilates to form the flask-shaped called ?, which is the only glandular portion of the tube

Answer 22

ampulla

Question 23

What consists of the structures carried down by the testicle on its migration through the inguinal canal from the abdominal cavity to the scrotum?

Answer 23

spermatic cord

Question 24

What is the passage from the abdominal cavity to the exterior of the body, running ventro-medially and forward, and is formed by the deep and superficial rings?

Answer 24

Inguinal canal

Question 25

What is the potential space between the caudal border of the internal oblique muscle and the deep face of the aponeurosis of the external abdominal oblique muscle?

Answer 25

Deep (internal) inguinal ring

Question 26

What is the slit in the aponeurosis of the external abdominal oblique muscle that forms the external opening of the inguinal canal?

Answer 26

Superficial (external) inguinal ring

Question 27

The male organ of copulation • It is a highly erectile organ enclosing the extra-pelvic urethra. It extends forward from the ischial arch to end in the umbilical region on the ventral surface of the abdomen.

Answer 27

penis

Question 28

What part of penis attached to the ischial arch of the pelvis?

Answer 28

ROOT/CRURA

Question 29

main portion of penis

Answer 29

BODY

Question 30

free extremity of penis

Answer 30

GLANS

Question 31

What erectile tissue in the penis arises from each side of the ischial arch?

Answer 31

corpus cavernosum penis

Question 32

What erectile tissue in the penis forms a tube around the urethra and is continuous anteriorly with the glans penis?

Answer 32

corpus spongiosum

Question 33

The penis is supplied with blood by three arteries:

Answer 33

– Internal pudendal artery – Obturator in horses – External pudendal in horses

Question 34

• Produces the bulk of the ejaculate, or semen, the medium for transport of sperm

Answer 34

Accessory Sex Glands

Question 35

What provides favorable condition for nutrition of sperm and acts as a buffer against the natural acidity of the female genital tract?

Answer 35

Semen

Question 36

• Glandular enlargements associated with the terminal parts of the ductus deferentia • Empties into the ductus deferentia • Contribute volume to the semen • Well developed in stallion, bull and ram • Absent in boar

Answer 36

Ampulla

Question 37

• Formerly called seminal vesicles • Paired glands associated with genital fold • Merges with the ipsilateral ductus deferens, creating a short ejaculatory duct which empties into the pelvic urethra • Produce and secrete seminal fluid that nourishes the sperm and provides protection and transportation medium for sperm upon ejaculation • Empties into the pelvic

Answer 37

Vesicular glands

Question 38

In which animal the vesicular glands is hollow, pear-shaped sacs

Answer 38

Stallion

Question 39

In which animals lobulated glands the vesicular glands?

Answer 39

Bull, ram and boar

Question 40

• Unpaired gland that more or less completely surrounds the pelvic urethra • Secretes thick, milky fluid that mixes with seminal fluid to provide nutrition and substance to the semen • The secretions are high in inorganic ions like sodium, chlorine, calcium, and magnesium, producing an alkaline secretion that gives semen its characteristic odor

Answer 40

Prostate Gland

Question 41

• Formerly Cowper’s glands • Paired glands on either side of the pelvic urethra • Especially large in boar. • Produces a fluid that moves down the urethra ahead of the seminal fluid, cleans and neutralize the urine residue in the urethra that can kill sperm cells • These secretions are seen as dribblings from the prepuce just before copulation • In boars, their secretions account for that portion of boar semen which coagulates

Answer 41

Bulbo-urethral Gland

Question 42

Which animal accessory glands are complete. Urethral process is present.

Answer 42

HORSE

Question 43

Which animal penis sigmoid flexure behind scrotum. Glans long and twisted.

Answer 43

OX

Question 44

Which animal urethral process on glans is elongated into vermiform appendages?

Answer 44

SHEEP

Question 45

Which animal penis has sigmoid flexure in front of the scrotum. No glans.

Answer 45

PIG

Question 46

Which animal Bulbo-urethral urethral glands and seminal vesicles absent. Only prostate present. Corpus cavernosum penis is ossified anteriorly forming os penis.

Answer 46

DOG