How many bones does an adult have?: 206
Which is the biggest bone in the body?: The femur (thigh bone)
Which is the smallest bone?: The stapes, in the ear
How many teeth do most adults have?: 32, including wisdom teeth
How many baby teeth do children have?: 20
What organ pumps blood?: The heart
What are the lungs for?: Breathing in oxygen and out carbon dioxide
What is the biggest organ?: The skin
Which organ is used for thinking?: The brain
How many chambers does the heart have?: Four
What color is blood inside the body?: Red
What do red blood cells carry?: Oxygen
What do white blood cells do?: Fight germs
What is the job of the stomach?: To break down food with acid and churning
What does the liver do?: Cleans the blood and helps digest fat
What do kidneys do?: Filter waste from blood to make urine
What organ protects your brain?: The skull
What protects your heart and lungs?: The rib cage
What are muscles for?: Moving the body
Which muscle never gets a rest?: The heart muscle
How many senses do we usually count?: Five: sight, hearing, smell, taste and touch
What part of the eye lets in light?: The pupil
What part of the eye is colored?: The iris
What do ears help us do?: Hear and keep balance
What are taste buds?: Tiny sensors on the tongue that detect tastes
What are the basic tastes?: Sweet, salty, sour, bitter and umami
What are fingerprints?: Unique patterns on fingertips
What does the skeleton do?: Gives shape, protects organs, and helps movement
How many ribs do most people have?: 24, in 12 pairs
What is the spine?: A column of bones (vertebrae) that protects the spinal cord
What are joints?: Places where two bones meet
What is the windpipe called?: The trachea
What tube carries food to your stomach?: The esophagus
How long is the small intestine?: About 20 feet (6 meters) in adults
What happens when you sneeze?: Your body pushes out dust or germs from your nose
Why do we get hiccups?: The diaphragm twitches suddenly
Why do we sweat?: To cool the body down
How much of your body is water?: About 60 percent in adults
How often does your heart beat?: About 60 to 100 times a minute for adults at rest
How many hours of sleep do kids need?: About 9 to 12 hours, depending on age
What does sleep do?: Lets your body and brain rest and grow
What are vitamins for?: Helping the body work and grow
What is calcium good for?: Strong bones and teeth
What is the nervous system?: The brain, spinal cord and nerves that send messages
What is DNA?: The instruction code inside cells
What is a cell?: The smallest building block of living things
How many muscles help you smile?: It takes several muscles in your face
What is the funny bone?: A spot on your elbow where a nerve runs near the surface
What is goosebumps?: Tiny muscles at the base of hairs tighten
What does the cerebellum control?: Balance and coordination
What are tonsils?: Tissue at the back of the throat that helps fight germs
What is an appendix?: A small pouch attached to the large intestine
What do eyelashes do?: Help keep dust out of your eyes
What do nails protect?: The tips of your fingers and toes
What is the pulse?: The beat of your heart felt in your wrist or neck
What is the diaphragm?: A muscle under the lungs that helps you breathe
What is the largest muscle?: The gluteus maximus in the bottom
What helps wash hands clean?: Soap and water for at least 20 seconds

Free flashcards from Peabody at peabody.kids/flashcards/fun-human-body-facts