Reproductive System

Sperm become motile in the

epididymis

The function of the pampiniform plexus of veins is to

help cool blood

This layer of the uterus contracts during parturition to expel the baby.

myometrium

Tubules that connect testicular lobules with the efferent ductules of the epididymis

rete testis

In cows, the nipples (teats) are in the groin region, not in the midthorax as in humans. What is the most logical reason for this difference between cows and people

Cows' mammary glands arise from a different part of the milk line.

The usual site of embryo implantation is the

uterus.

Fingerlike placental structures where oxygen and nutrients from the maternal blood supply diffuse into the embryonic blood

chorionic villi

A woman has developed a cancerous lump in each breast, and the skin of the breasts is dimpled. What structure(s) is (are) causing the dimpling

suspensory ligaments of the breast

This multinucleate embryonic structure invades the uterus, digesting cells and maternal blood vessels to make way for development of the placenta.

syncytiotrophoblast

At what point during fetal development is the decidua basalis/chorionic villi collectively referred to as the placenta?

the start of fourth month

Which of the following is the primary sex organ in the male?

the testis

Type of cell in the testes that produces testosterone.

interstitial

A woman's sex cells (germ cells) originate embryologically

from yolk sac endoderm.

The opening of the oviduct is surrounded by these structures.

fimbriae

Fertilization of the ovum normally occurs in this region of the oviduct.

ampulla

The fluid-filled cavity in a mature ovarian follicle is known as

antrum.

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

dartos muscle

Tubular organ that is transected during a vasectomy.

ductus deferens

The female homologue of the male scrotum is the

labia majora

The correct sequence of sperm-transporting tubules that transport spermatozoa to the epididymis is the

seminiferous tubule to straight tubule to rete testis to efferent ductule

A factor that propels an oocyte through the uterine tube is

smooth muscle contraction (peristalsis).