what's inside: anatomy

Anatomy covers the structure and functions of the body's organs and systems. Learn how these components work in harmony to sustain human life.

Body Systems

Body Systems

Your body is pretty amazing. At any given point you have many biological processes going on -- circulatory, digestive, brain & central nervous systems and more. Learn about these body systems as well as the eye, ears, nose and throat. See more »

Cells & Tissues

Cells & Tissues

Cells & Tissues are the building blocks for human organs. Learn about the structure and function of cells and tissues. See more »

featured articles

FPO

How Your Lungs Work

You breathe in and out anywhere from 15 to 25 times per minute without even thinking about it -- it just happens naturally. Learn all about your lungs, various conditions and diseases, and what makes the breath of life so crucial.

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FPO

How Natriuretic Peptides Work

The natriuretic peptides are sometimes called the body's \natural diuretics\" because they lower the concentration of sodium in the blood."""

FPO

How Hearing Works

Ears are truly extraordinary organs and hearing is a fascinating process. Ears pick up all the sounds around you and then translate this information into a form your brain can understand.