Inside Your Body

Under your skin, your body runs like a busy city, and every organ has a job. Your heart is the pump - a muscle about the size of your fist that pushes blood to every corner of your body, all day and all night, without being asked.

Your lungs are the breathing team, pulling in oxygen and sending out carbon dioxide with every breath. Your stomach and intestines are the food processors, breaking lunch down into tiny pieces your body can use for energy and building blocks. And your brain is the boss, sending messages along nerves faster than you can blink, telling muscles to move and helping you think, feel, and remember.

Your body also has a defense force. Skin keeps germs out, and when germs do get in, your immune system hunts them down. Sleep, water, good food, and exercise keep every part of the city running well - taking care of your body is taking care of you.