検索キーワード： 解剖学・生理学

Did you know your eyelids close and open 10 to 20 times a minute! Your eyes have parts that work together. The pupil lets light into your eyes. The iris controls how much light gets in. The cornea, a bowl-shaped layer, covers and protects your eyeballs. Discover how hairs on your eyelashes protect your eyes from germs and dirt, and other ways your eyes help you see and keep you safe!

Do you know how your ears can hear? Did you know they’re responsible for other things, too? For one thing, they keep you balanced on your feet! Learn about the anatomy of your ear and how its structure allows you to hear all the different noises you experience every day.

Tiny creatures called microbes live in, and on your body that can be helpful. But some are bad like bacteria and viruses–in fact, they can make you sick! Your body needs medicine called antibiotics to fight and kill these germs so you can feel better. You must get a different medicine called a vaccine to keep from catching a virus.

Have you ever been sick with strep throat? It's an illness caused by bacteria that gives you a painful sore throat! Learn how doctors can diagnose it by your symptoms and a test, and how medicine can cure strep throat so you can get better. Be sure to take all of the medicine until its gone if you have strep. You might even impress your doctor on your next visit with your new knowledge!

Germs are everywhere and make your body sick. Never fear–the body is a germ-fighting machine designed to fight these intruders and keep you healthy. If you get a cut, blood clumps together to stop bleeding. Mucus, the sticky goo in your nose, catches germs to help you sneeze them out. Eyelashes and eyelids form tears that block some germs! Discover ways the body fights to keep germs out.

The #1 bestselling Girl’s Body Book includes everything you need to know about growing up, even the embarrassing stuff. The newly updated fifth edition provides advice for parents and addresses questions a pre-teen girl may have while maturing through puberty and starting her period. "What is...

The #1 bestselling Boy's Body Book includes everything you need to know about growing up, even the embarrassing stuff. The newly updated fifth edition provides advice for parents and addresses questions a pre-teen boy may have while maturing through puberty and becoming a man. Everything is...

Your senses are an amazing part of the human body. They allow you to see, smell, hear, and taste things! Did you know you can trick them? Learn about the different optical illusions that will make your senses go wild!

How smart can humans really be? According to a panel of expert canines, we're awfully confusing! We ignore the fact that we have a big water bowl in the bathroom, and don't even re-eat our vomit! Follow along and see why our pets might think we're a little silly.

What would you give for a bucket of pee? You might be surprised—pee is full of useful stuff! It’s had a lot of uses throughout history. See how people have used urine for important aspects of life— including cleaning your clothes and brushing your teeth!