Male Repro anatomy

Question 1

Male sex organs

Answer 1

Primary - Testes
- Produce gametes and testosterone

Secondary -Dust system for transport - epididymis, ductus deferens

Accessory organs- Provide fluid (prostate gland, ampullae, seminal vesicles, bulbourethral gland)

Question 2

Basic components of manle repro tract

Answer 2

Spermatic cord
Scrotum
Testis
Excurrent duct system
Accessory sex gland
Penis and muslces for erection, protrusion, emission and ejactulation

Question 3

Function of Testes

Epididymis head function

Epididymis tail function

Accessory sex gland

Penis

Answer 3

Manufacturing
Sperm production (1-25x10 ^9) per day

Finishing station
Fluid absorption
motility

Storage of sperm

Surface coating
Transport

Erection, protrusion, emission, ejaculation

Question 4

Spermatic cord function

Answer 4

Suspends testis through inguinal canal
Houses
-Ductus Deferens (trandport sperm)
-Cremaster muscle (supports testes, temp control by pumping blood through pampiniform plexus)

• Pampiniform Plexus (heat exchange)

Question 5

Thermo regulation of testis

Answer 5

4-6 degress
To hot = low motility, reduced embryo survival

-Pampiniform plexus - Counter current heat exchange

• Cremaster muslce
• Short term contractions during fear creates pumping action

-Sweat glands

• Tunica dartos
• long term contractions, smooth muscle in the scrotal wall

Question 6

Scotum layers

Answer 6

Skin - has sweat glands
Tunic dartos
scrotal fascial
Pareital vaginal tunic

Question 7

Testes

Answer 7

Sperm and testosterone

• Testicular capsule (visceral vaginal tunic and tunica alberginea) pump sprem around

Parenchyma - Tubular (seminiferous tubules) and interstitial compartments (interstitial cells)

Mediastinum

Rete tubules

Question 8

Seminiferous tubules

Answer 8

Part of tubular compartment

-

Question 9

Seminiferous tubules

Answer 9

Part of tubular compartment

• Seminiferous epithelium
• Sertoli Cells (produce sperm, receptors for FSH and Testosterone)
• Developing germs cells
• Peritubular cells

Question 10

Interstitial compartment

Answer 10

Cells and materials outside seminiferous tubules - blood vessels, nerves, intersitial cells of leydig - produce testosterone

Question 11

Blood Testis Barrier

Answer 11

Prevents immunologic destruction of developing germ cells

Formed by 1) peritubular cells surrounding seminiferous tubules and 2) sertoli cell junction complexes

Question 12

Excurrent duct system

Answer 12

Efferent Ducts - Convey sperm and fluid to:

Epididymal duct (maturation, storage, 60m long)

Ductus deferens (deliver sperms to pelvic urethra

Question 13

Accessory sex glands what do they do

Answer 13

non cellular portion of semen

Question 14

Ampullae, prostatem seminal vesicles, bulbourethral

Answer 14

Bull and stallion

Question 15

Prostate, boulbourethral, seminal vesicle

Answer 15

Boar

Question 16

Prostate

Answer 16

Dog

Question 17

Prostate and bulbourethral

Answer 17

Tom

Question 18

The penis

Answer 18

Copulatory organ

Base, shafft, glans penis

Question 19

Boars, bulls, rams

- retracts within sheath

Answer 19

Fibroelastic penis

Question 20

Stallion, dog

Answer 20

Musculo-cavernouse penis

diameter increases

Question 21

Shaft made of

Answer 21

Spongy erectile tissue (corpus cavernosum, corpus spongiosum

Question 22

Erections

Answer 22

Blood pumped by Ischiocavernosum muscle into corpus cavernosum mand spongiosum

Causes elongation and straightening of penis (sigmoid flexure)

Question 23

Intromission

Answer 23

Entry of penis into vagina

Question 24

Emission

Answer 24

Movement of ejactulate along ductus deferens tot he irethra where mised with accessory sex gland secretions

Question 25

Muscles involved in ejactulation

Answer 25

Urethralis
Ishiocavernosus
Bulbospongiosus
Rectractor penis muslcer