Exam 20: Pregnancy, Growth, Development, and Genetics

The most critical period of development, in which all the essential internal and external body parts form, is the __________ period.

What are teratogens?

What forms the placental membrane?

What is the purpose of the foramen ovale and ductus arteriosus in the fetal circulation?

What hormone stimulates the mammary glands to secrete milk?

The lower limbs reach their correct length relative to the rest of the body during the __________ period.

The union of a secondary oocyte and a sperm cell is called __________.

The substance called __________, produced in the lungs, decreases surface tension and is needed for the newborn to be able to expand its lungs.

During the process called __________, cells of the zygote undergo rapid division without increasing in size, becoming progressively smaller.

Describe the blood that is passing through the ductus venosus.

Fetal blood passes from the right atrium to the left atrium via what structure?