WHAT'S INSIDE: HUMAN BODY

The human body is an amazing structure made up of many fascinating parts and systems. Learn about the human body and how its systems work together.
  • Body Parts
  • Body Systems

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How much do you know about the human body?

FPO

Muscles are one of those things that most of us take completely for granted, but they're the body's engine. Without our muscles, we couldn't walk or talk -- and our blood would stop flowing.

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Natriuretic Peptide

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

Why do loud noises cause your ears to ring?

Back away from that speaker, turn down that iPod and put down that power tool unless you want the ringing in your ears to remain permanent. Sound can hurt you, and that ringing may be the first sign.

HEALTH: HUMAN BODY

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