What happens when a muscle contracts?
When a muscle contracts it gets shorter and pulls the tendons and the bone moves.
What does the acid in your stomach do?
The acid in my stomach breaks down the food I swallow into smaller pieces.
What do white blood cells do?
White blood cells find bacteria and viruses, and destroy them as soon as they enter our bodies so we do not become sick.
Why do transplant patients have to take medicine for the rest of their lives?
Transplant patients have to take medicine for the rest of their lives so their body doesn’t reject the new organ.
Why might people want to clone themselves?
People might want to clone themselves so they have organs for transplants that their body won’t reject.
What does the digestive system do?
The digestive system converts food into energy.
What does the nervous system do?
The nervous system sends signals between your body and your brain through your nerves.
What does the immune system do?
The immune system finds and destroys things in our body that do not belong there.
