Across
- 2. Lower part of the brain that controls balance and movement
- 6. The squeezing motion done by the esophagus and other parts of the digestive system that pushes food through
- 8. Blood vessel that carries blood away from the heart - usually has thick walls and is strong
- 9. A column of nerve tissue that runs from the base of the skull to the middle of the back
Down
- 1. The lowest part of the brain that controls vital functions such as breathing, heart rate, and blood pressure
- 3. A biomolecule that speeds up chemical reactions
- 4. Blood vessels with walls so thin that oxygen and CO2 molecules can slip through
- 5. Blood vessel that brings blood back to the heart for a visit - usually thin with weak walls
- 6. Relating to the lungs
- 7. Any of the many tiny air sacs of the lungs which allow for rapid gaseous exchange