Male Repro: Overview and Testes

Question 1

Male Primary Sexual Characteristics

Answer 1

Penis, scrotum, sperm, testes->testosterone

Question 2

Scrotum

Answer 2

Sac of loose skin, fascia, and smooth muscle divided into two pouches by septum
- contains Dartus Muscle (causes wrinkling)

Question 3

Temperature regulation of testes

Answer 3

Sperm survival requires 2-3 centigrade lower temperature than core body temp
- Cremaster Muscle

Question 4

Cremaster Muscle

Answer 4

In spermatic cord, skeletal muscle
- elevates testes on exposure to cold and during arousal
- warmth reverses the process
- contraction raises testicals

Question 5

Testes

Answer 5

Paired oval glands surrounded by dense white capsule called Tunica Albuginea
- each teste is filled with 2-3 seminiferous tubules where sperm are formed

Question 6

Tunica Vaginalis

Answer 6

Piece of peritoneum that descended within testes into scrotal sac
- allows for easier movement of testes within the scrotum

Question 7

Descent of Testes

Answer 7

Develop near the kidney on the posterior abdominal wall
- descends into scrotum by passing through inguinal canal (during 7-8 month of fetal development)
- vaginal process could remain open and patent and abdominal organs could potentially herniate into the scrotum

Question 8

Gubernaculum

Answer 8

Pulls testicles inferiorly and tunica vaginalis gets pulled with it.

Question 9

Pathway of Sperm Flow Through the Ducts of the Testis

Answer 9

1. Seminiferous tubules
   - sperm formation toward Rete Testes through efferent ducts
2. Epididymis
3. Ductus (vas) Deferens
4. Ejaculatory Ducts
5. Urethra

Question 10

Epididymis

Answer 10

20 ft coiled tube like structure wrapped along the outside of testes
- stores sperm
- sperm matures here and gains motility
- sperm nourished
-head, body, tail

Question 11

Ductus (vas) Deferens

Answer 11

moves sperm, pathway of 18in muscular tube, lines by ciliated pseudo-stratified columnar epithelium
- ascends along posterior border of epididymis
- passes through spermatic cord and inguinal ligament
- reaches posterior surface of urinary bladder
- empties into prostatic urethra with seminal vesicle
- convey sperm along through peristaltic contractions of muscle lining

Question 12

Vasectomy

Answer 12

Surgical procedure to cut and tie the ends of vas deferens