The pulsing of arteries that are adjacent to lymphatic vessels provides a pressure on the vessels that helps them propel the lymph.

Protozoans are obligate intracellular parasites.

In terms of their chemical structure, cytokines are _______; their function is to serve as _________.

What are considered the effectors of humoral immunity?

Tonsils have multiple invaginated outer edges called _______ that help trap material.

If a patient becomes dehydrated, the percentage of plasma in a centrifuged sample of his or her blood would likely

Multiply and then simplify. 3(3+2){“version”:”1.1″,”math”:”3(3+2)”}

An individual’s hematocrit would vary with

Chemotaxis is the process by which

Oxygen-poor blood is _________ in color.