A substance that is released into the interstitial fluid and acts on neighboring cells without first entering the blood is a(n) __________ hormone.

Fusion of the sperm and secondary oocyte pronuclei results in the formation of a new cell called the __________.

Hormones that maintain pregnancy are __________, estrogens, and progesterone.

Which stage of labor is correctly described?

The adrenal __________ releases epinephrine and norepinephrine.

The development of organs and body systems

Endoderm, mesoderm, and ectoderm are the three primary __________  __________.  (2 words)

Oscar has type O blood.  His birthmother, Bertha, has type B blood. His birthfather, Alfredo, has type A blood.  What are the genotypes of Oscar’s parents?

The __________ are the female gonads.

The process by which the fetus is expelled from the uterus is __________.