Human Body

2. The brain, part of the nervous system, sends a signal through nerves to our muscles to contract or relax which makes our bones ____.
4. The lungs are part of 2 systems. The respiratory system for helping bring oxygen into the body and excretory system for helping get rid of ____ dioxide.
6. All cells need water to survive, the large intestines, which are part of the ______ system, are responsible for putting water into the circulatory system to be delivered to our cells.
8. The nervous system sends signals to the heart to make it pump so it can go get oxygen at the heart, _____ from the small intestines, and water from the large intestines and deliver it to our cells.
9. The kidneys are part of the excretory system. The circulatory system's blood vessels drop the _____ off from the cells at the kidneys to be removed from the body.
10. The circulatory system needs blood to pump around the body. The blood is made inside the bones which is part of the ____ system.

1. All cells create waste and would die if it was not _____.
3. The lungs, which are part of the respiratory system are responsible for putting ______ into the blood for the circulatory system to delivery to our cells.
5. All cells need nutrients and oxygen; therefore, no systems would survive without the ____ system to deliver these things.
7. The function of the digestive system is to digest food. To do this, the food must move through the digestive system.