During respiration, the blood entering the lungs through the pulmonary arteries has a high concentration of _________.

According to the Centers for Disease Control (CDC), a diagnosis of AIDS is made when ______.

Muscles that help the prime mover are called _________.

Lymph from the legs, abdomen, left arm, and left side of the head, neck, and chest flows into the _________.

The lungs are composed of spongy tissue, blood vessels, connective tissue, and microscopic air sacs called _________.

According to the Centers for Disease Control (CDC), a diagnosis of AIDS is made when ______.

_________ anemia is the result of excessive blood loss either from wounds or internal bleeding.

In males, reproductive cells are called spermatozoa.

_________ anemia is the result of excessive blood loss either from wounds or internal bleeding.

Which condition is caused by a viral infection?