15 human body facts:
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,body parts,human brain,human body parts,,human body systems,human body facts,muscles of the human body,human body system,nose, fingernail 6 months to grow base to tip, skin,bladder, small intestine, brain energy 25 watts bulb, heart pressure 30 feet, new stomach lining 4 days, 650 muscles in body, thigh bones human body diagram,500,000 sweat glands, full bladder size is soft ball shape, 20 feet blood vessels in each square inch skin, health facts,,health care,physical health,,body massage,full body massage,visible body, 15 human body facts