Male Reproduction

Question 1

3 important parts of scrotum

Answer 1

• Dartos muscle
• Cremaster muscle (derived from internal oblique)
• Pampiniform plexus of veins

Question 2

Right testicular vein

Answer 2

Drains into inferior vena cava

Question 3

Left testicular vein

Answer 3

Drain into left renal vein

Question 4

Prostate gland location

Answer 4

• Beneath urinary bladder

* Above external urethral sphincter

Question 5

Internal urethral sphincter characteristics

Answer 5

• Neck of urinary bladder
• Involuntary muscle
• Controlled by sympathetic nerve

Question 6

External urethral sphincter

Answer 6

• Beneath the prostate gland
• Skeletal muscle
• Somatic muscle

Question 7

Coverings of testis

Answer 7

• Parietal layer tunica vaginalis
• Visceral layer tunica vaginalis
• Tunica albuginea
• Tunica vasculosa

Question 8

Tunica Albuginea

Answer 8

Mediastinum testis (thickened tunica albuginea), many septa go forwards from it, forming 200-300 lobules

Question 9

Tunica vasculosa

Answer 9

• 200 to 300 compartments, each has 2 to 3 seminiferous tubules
• Tubules have spermatogenic cells which produce spermatozoa

Question 10

Types of spermatozoa

Answer 10

• Type A spermatogonia
• Type B spermatogonia
• Primary spermatocyte
• Secondary spermatocyte
• Spermatid
• Mature spermatozoa

Question 11

1st meiotic division

Answer 11

Primary spermatocyte to secondary spermatocyte

Question 12

2nd meiotic division

Answer 12

Secondary spermatocyte to spermatid

Question 13

Spermiogenesis

Answer 13

Spermatids accumulate hydrolytic enzymes, rearrange, reduce organelles, form flagella, shed cytoplasm, form acrosome

Question 14

Spermatogenesis

Answer 14

Process by which haploid spermatozoa develop from germ cells in the seminiferous tubules of the testis

Question 15

Sertoli cells

Answer 15

Support spermatogenic cells

Question 16

Leydig cells

Answer 16

Interstitial cells that secrete testosterone