I absorb the nutrients that your body needs from your food and I put it in your bloodstream so your body can use it. What am I?

I am a muscle located behind your lungs. I am always moving, and I never get tired. I pump blood to all parts of your body. What am I?

When you eat, I mix your food with chemicals made by your body, then I churn up your food into smaller parts. What am I?

Your body can't use every part of the food you eat. The waste comes to me, and I dry it out so it can leave your body. What am I?

We are a pair of filters that clean your blood. We take liquid waste from your bloodstream and we send it down to your bladder. What are we?

We take oxygen that your body needs from the air and put it in your bloodstream. We also take carbon dioxide that is in your blood and send it out of your body. What are we?

I control your muscles and all of the organs in your body. I make sure you breathe automatically, ensure your heart beats properly, and remind you to blink your eyes. I even hold all of your thoughts and memories.

What am I?

We give your body support and structure. We also protect your delicate organs, like your brain, liver, and lungs. We are filled with a substance called marrow.

What are we?

We are blood vessels that send blood BACK towards your heart. Most of the blood we carry doesn't have much oxygen left in it. What are we?

We are blood vessels that send blood AWAY from your heart to all different parts of your body. We have thicker, stronger walls than veins. What are we?

I am sometimes called your “windpipe.” When you breathe, air travels through me to your lungs. What am I?

We work in pairs to pull your bones in different directions. We also help move food and blood through your body. Without us, you'd wouldn't be able to move at all. What are we?

I am a tube in your throat. When you swallow, food or drink travels down through me into your stomach. What am I?

I hold your body parts in. I have pores so sweat can escape your body. I am filled with nerves that help you to sense temperature and feel the things around you. What am I?