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The female gonad is the _________.

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

In males, reproductive cells are called spermatozoa.

A common complication of __________ is the possibility of a secondary bacterial infection.

____________ occurs when the smooth muscles in the arterial walls relax and the diameter of the vessel enlarges.

Which condition is caused by a viral infection?

Which condition is caused by a viral infection?

A bolus is a soft ball of food created by the action of the teeth, tongue, and saliva.

__________ coordinate immune defenses and kill organisms in cells on contact.

__________ coordinate immune defenses and kill organisms in cells on contact.