Blood - Blood is the red liquid that carries oxygen from your lungs and nutrients from your food to every part of your body.
Blood Vessels - Your blood travels all around your body through tubes called blood vessels.
Bones - Bones are strong and hard. They make a frame called a skeleton to support your body.
Brain - You think with your brain and make sense of the world around you.
Disease - A disease makes you feel sick. Sometimes you might need an injection to protect you.
Energy - People use energy from food to keep warm, to grow, and to move.
Germs - Germs carry diseases.
Heart - Your heart is a strong muscle that pumps blood all through your body.
Joints - Joints are where your bones are joined together. They allow your body to bend and move. Knees and elbows are joints.
Lungs - You have two lungs that are like bags inside your chest. They fill up with air when you breathe in and empty when you breathe out.
Muscles - Muscles are attached to your bones so that you can move them. Other muscles help you breathe and swallow food. Your heart is an example of a muscle.
Nerves - Nerves connect your brain to the rest of the body. They take messages to and from your brain.
Oxygen - Oxygen is a kind of gas that is part of the air we breathe. Our bodies need oxygen to work.
Ribs - Your ribs are the bones that make a cage that protects your heart and lungs.
Saliva - Saliva is a liquid that is made in your mouth. It helps food to break down when you swallow it.
Skull - Your skull us the bone in your head that protects your brain and gives your head a shape.
Stomach - When you eat, your food goes into your stomach, where juices break down into very tiny pieces.
Tendons - Tendons are strong cords that attach your muscles to your bones.