Human Body Facts
Interesting and important facts about human anatomy, physiology, and biological systems.
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TL;DR: Interesting and important facts about human anatomy, physiology, and biological systems.
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Interesting and important facts about human anatomy, physiology, and biological systems.
Human Body Facts
- Bones: Adult human has 206 bones; babies are born with 270
- Muscles: Human body has 639 muscles; make up 40 percent of body weight
- Heart: Pumps blood; beats approximately 100,000 times daily
- Blood: Adult has about 5-6 liters; red blood cells live 120 days
- Lungs: Two lungs; right lung larger than left; breathe 20,000 times daily
- Brain: 100 billion neurons; controls all body functions
- Skin: Largest organ; covers 2 square meters; regenerates every 28 days
- Eyes: Can distinguish 10 million different colors; blink 17 times per minute
- Ears: Can detect 1,000 different pitches; contain 16,000 hair cells
- Teeth: Adult has 32 teeth; enamel is strongest substance in body
Frequently Asked Questions
How many bones does an adult human have?
An adult human has 206 bones; babies are born with 270 bones that fuse as they grow.
How many muscles does the human body have?
The human body has 639 skeletal muscles that make up approximately 40 percent of body weight.
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