Learn about the basic organization of the body's organs and the major organ system.

Find out how the body rids itself of wastes and fights off infections with the help of the lymph nodes and white blood cells.

A comprehensive guide to the various types of circulatory systems, including the vertebrate cardiovascular system, the vertebrate vascular systems, the heart, the vascular system, blood, the lymphatic system, learning objectives and...

Find out what the lymphatic system does, how it works with other systems, and the significance of keeping an eye on the lymph nodes.