A person who has type B blood:

Lymphocyte production occurs in:

Which organ is responsible for filtering the blood?

Plasma is mostly made up of:

The middle layer of the heart contains ________ muscle.

________ are large lymphoid nodules that are located in the walls of the pharynx.

If the thymus shrank and stopped functioning properly, we would expect to see an immediate decrease in the number of

Inflammation produces all of the localized effects except

White blood cells are important because they:

Which term refers to a blood vessel that carries blood away from the heart?