Across
- 6. small part of the kidney that filters blood
- 7. system regulates liquid in the blood
- 8. tubes that connect the bladder and kidney
Down
- 1. tiny air sacs in lungs
- 2. organ that filters blood
- 3. respiration uses O2 to break apart glucose
- 4. system brings O2 removes CO2
- 5. cavity spaces in chest