Across
- 4. function by transferring oxygen that we bring in from our external environment
- 5. pineal gland, pituitary gland
- 6. all the bones
- 7. contains those b cells and t cells that help us fight against disease-causing microbes
- 8. include your brain and spinal cord
Down
- 1. Two kinds:smooth and the cardiac
- 2. the largest organ system of the body
- 3. includes the blood the heart and all of the blood vessels