Ch. 25: Reproductive System

Involuntary contraction of this smooth muscle layer wrinkles and thickens the walls of the scrotum to prevent heat loss.

dartos muscle

All of the following are adaptations for keeping the testes cool except the

testicular artery

Type of cell in the testes that produces testosterone.

interstitial

The zona pellucida

is a protective shell around the oocyte that sperm must penetrate for fertilization to occur.

sustentocytes

1. conveying nutrients to spermatogenic cells 2. secreting inhibin 3. phagocytizing cytoplasm shed by spermatids 4. secreting testicular fluid

T/F Oogenesis takes years to complete

True

Adaptions for keeping testes cool

1. cremaster and dartos. 2. pampiniform plexus of veins. 3. descent of the testes into the scrotum before birth.

In what way are the prostate and the bulbourethral glands similar?

They are both compound tubuloalveolar glands.

The phases of the uterine cycle occur in the following order. The phases of the uterine cycle occur in the following order.

menstrual phase (days 1-5); proliferative phase (days 6-14); secretory phase (days 15-28)

The female uterine cycle begins

on the first day of menstruation