Foramen ovale:

Which of the following types of white blood cells kills parasitic worms; destroys antibody complexes; and inactivates some inflammatory chemicals of allergy?

Cardiac muscle contains _____ that anchor cardiac cells together and encourage the movement of ions across the membrane. 

Oocytes are viable for _____ post-ovulation.

The ectoderm:

An ovulated oocyte is protected by the _____ that sperm must penetrate in order to fertilize.

Mammary glands:

The gland that produces hormones stored in the neurohypophysis (posterior pituitary) is:

Cretinism involves:

In order for the thyroid gland to efficiently produce thyroid hormone (TH) the human body must have adequate amounts of _____.