__________ coordinate immune defenses and kill organisms in…

The __________ is the functional unit of the kidney.

A zygote is created when two __________ unite.

A zygote is created when two __________ unite.

Sperm cells are produced in the _________.

Which hormone causes the uterus to contract during and after…

__________ in certain arteries are sensitive to carbon dioxi…

__________ in certain arteries are sensitive to carbon dioxi…

When the distance between the ends of a contracting muscle i…

The ___________ nervous system regulates the actions of glan…