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Human Body Facts

Brain & Mind

61 Facts

Heart & Blood

61 Facts

Bones & Muscles

64 Facts

Senses

31 Facts

Sleep

08 Facts

Longevity

36 Facts

Digestion

12 Facts

Skin

06 Facts

Immune System

06 Facts

Lungs & Breathing

11 Facts

Hormones

04 Facts

Eyes & Vision

05 Facts

DNA & Cells

23 Facts

Teeth & Mouth

02 Facts


Your heart beats over 100,000 times every day
Your lungs contain nearly 1,500 miles of airways
Humans spend about one-third of life asleep
Your feet have about a quarter of all the bones in your body
Split attention between two conversations is surprisingly poor
Your brain generates enough electricity to power a small LED
Your liver can regenerate even after major tissue loss
Your body makes about 25 million new cells every second
Babies have more taste buds than adults
Taste buds renew themselves roughly every 1–2 weeks
You are born with about 300 bones — and end up with 206
Your brain uses about 20% of your body’s energy
You have more bacterial cells than human cells
Your ears never stop growing
Stomach acid is strong enough to dissolve metal
You have about 60,000 miles of blood vessels
Your brain is about 75% water
Your nose can detect about one trillion different smells
Fingernails grow about 3–4 millimeters a month
Goosebumps are leftover from when humans had thicker fur
Blood makes a full body circuit in under a minute
During REM sleep, your body is temporarily paralyzed
Your small intestine is about 20 feet long
Bone is stronger than steel by weight
Humans blink about 15–20 times every minute

Human Body