Exam 20: Development

The temporary organ that functions in the exchange of gases,nutrients,and waste between maternal and fetal blood is the

What is the term for the period of prenatal development during which organogenesis occurs?

The second meiotic division in oogenesis is not completed until after a spermatozoan has penetrated the cell.

Temperature regulating mechanisms are well developed in the neonatal period.

What is the term for the vessels that carry fetal blood to the placenta for gaseous exchange?

Capacitation is a process that

The term that refers to excessive vomiting during pregnancy is

The opening between the right atrium and left atrium in the fetal heart is the

The period of development after birth is called

The longest stage of labor is the _____ stage.

Recessive genes express themselves even when they are heterozygous.

The normal gestation period in humans is

What is the term for the longest stage of labor?

Pressure of the fetal head on the cervix stimulates

The primary germ layers that develop during the pre-embryonic period include all of the following EXCEPT