1. The circulatory system provides the brain with constant supply of ______ blood to make it function well.

2. The lungs expel the______ and bring in new oxygen - containing air.

3. The muscular, Skeletal and nervous systems must work together to create __________.

4. The excretory and Digestive Systems work cooperatively to eliminate _______ from the body.

5. The nervous system regulates the_________ at which food moves through the stomach during digestion.