Reproduction Anatomy male

Question 1

What are the three tissue types histologically evident in testes

Answer 1

Seminiferous Tubles (cells lining tubes produce spermatazoa)

Interstital tissue (cells within this tissue produce testosterone- Leydig cells)

Connective tissue (structural support)

Question 2

3 main components of the internal testes structure

Answer 2

Tunica Albuginea

Mediastinum testis

Seminiferous Tubules

Question 3

Function of the seminiferous tubules and the two cewll types found

Answer 3

Where spermatogenic cells replicate and develop into spermatozoa

Two cells types:

• supporting cells (sertoli cells) provide nourishment and support
• Spermatogenic cells: which undergo meiosis and develop into mature spermatozoa

Question 4

Describe the journey of the sperm

Answer 4

Seminiferous tubule > Rete testis > testis > efferent ductules > epididymal duct (head) > Epipdidymal duct (tail) (stored here) > Ductus deferens

Question 5

What are the 3 sections of the epididymis and there functions?

Answer 5

Head & Body : Spermatozoa enter and undergo changes allowing them to become fertile

Tail: Spermatoza are stored here in a buffer solution, ready for ejaculation.

The sperm gain the ability to swim while moving through the duct

Question 6

What happens to testes during development

Answer 6

They initially develop near the kidneys and descend to the external position. The timing is species dependent.

Question 7

Spermatic cord contains

Answer 7

Arteries and veins
Lympthatic vessels 
Sympathetic nerve fibers 
Cremaster muscles 
Ductus deferens 
Connective tissue
Surrounding peritoneum

Question 8

How is temperature regulated for spermatogensis?

Answer 8

• Spermatogenesis occurs at below the body temperature, therefore testes are kept external to the body.
• Muscles contact and relax to move closer/ away from body
• Pampiniform plexus cools blood passing through spermatic cord.
• Sebaceous and sweat glands lining scrotum

Question 9

Explain the Pampinform plexus

Answer 9

counter current heat exchange

coiled artery plus network of veins

exchange of heat from warmer arterial blood to cooler venous blood

Question 10

What is spermatic fluid produced by?

Answer 10

Epididiymus & Accessory sex glands

Question 11

What are?
Prepuce
filiform
sigmoid flexure

Answer 11

Prepuce = fold of skin covering penis in flaccid state

filiform = thread like urethral process, which extends beyond the glands

sigmoid flexure = extends and retracts penis with retractor muscles

Question 12

What are the two types of penis

Answer 12

Musculocavernous =
Cavernous spaces
CT tissue capsule contains smooth muscle
Requires blood and grows in diameter and girth

Fibroelastic=
Limited cavernous space
Thick CT with no smooth muscle
 Does not require blood and increase in rigity but not length or diameter 
sigmoid flexure

Question 13

Accessory Sex Glands

Answer 13

Ampullary glands
Vesicular glands
Prostate
Bulbourethral glands

Question 14

Ampullary glands in 
Stallion
Bull 
Boar 
Dog

Answer 14

Extensive in stallion and bull.

Very little in boar and non in dog

Question 15

Vesicular Glands in
Stallion
Bull 
Boar 
Dog

Answer 15

Presnet in stallion, bull and boar. Not in dogs.

Question 16

Describe the prostate

Answer 16

Can be various portions of disseminate or body. Disseminate is individual glands in the submucosa urthea. Body is lobulated with a thick connective tissue capsule. The amount varies depending on species.

Question 17

Prostate glands in
Stallion
Bull 
Boar 
Dog

Answer 17

Bull and boar have a small small prostate body and extensive disseminate.

Dog and horse have a well defined prostate body with a reduced disseminate.

Question 18

Bulbourethral Glands
Stallion
Bull 
Boar 
Dog

Answer 18

Large in Staillion and boar but small in bull.

Not present in dogs and cats