Across
- 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.
Down
- 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.