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The composition and function of blood in the human body

Functions of Blood: 8 Important Facts about Blood

Just how important is blood to the human body? It not only transports oxygen and other substances throughout the body, but it helps fight sickness. Did you know it also transports nutrients and hormones? Find out more facts about this living fluid.

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At the Heart of It All: Anatomy and Function of the Heart

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The network of arteries, veins and capillaries throughout the body

Blood Vessel Structure and Function: How the Circulatory Network Helps Fuel the Entire Body

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The heart in pulmonary and systemic circulation

Pulmonary Circulation and Systemic Circulation: The Routes and Function of Blood Flow

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Atherosclerosis, and example of a circulatory disease

Circulatory System Pathologies: Common Diseases and Disorders

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