Across
- 3. - Windpipe connecting throat to lungs
- 5. - Tube connecting kidney to bladder
- 6. - Fluid part of blood
- 7. - System that breaks down food
- 10. - The largest organ of the body
- 11. - Pumping organ of the circulatory system
- 12. - Tiny air sacs in the lungs
- 13. - Main organ of the nervous system
Down
- 1. - Muscle separating chest from abdomen
- 2. - Blood vessels carrying oxygen-rich blood
- 4. - Structural units of bones
- 8. - Gland that regulates metabolism
- 9. - Shoulder blade bone
- 10. - Bone protecting the brain