blood

An illustrated exploration of the circulatory system that follows a red blood cell through the body, describing each part and its function.

Provides information about the circulatory system, discussing what blood is made from, the role of the heart, how organs clean blood, and other related topics, and includes quick facts.

Describes the structures and functions of the respiratory and circulatory systems, including the lungs and airways, blood cells, the heart, arteries, veins, capillaries, pulmonary circulation and the lymphatic system.

A simple introduction to the composition and functions of blood.

Discusses how the heart and circulatory system work, the functions of blood, how doctors help people with blood and heart disorders, and how to keep the cardiovascular system healthy through diet and exercise.