Across
- 4. A rod-like organelle of a muscle cell.
- 5. Arteries that stem off of the aorta and deliver blood to the heart.
- 7. The first part of the small intestine, which turns partially digested food into nutrients.
- 8. A substance formed by the breakdown of protein in the liver.
- 11. Large artery that delivers oxygen-rich blood to your body.
- 13. The upper chambers of the heart.
- 14. A flap that covers the larynx when swallowing to prevent fluids from leaking in.
- 17. When certain filtered substances are absorbed back into the bloodstream.
- 18. A hairlike structure on the surface of cells.
- 19. Highly sensitive connective tissue between muscles and bones.
Down
- 1. Artery that takes blood from the heart to the kidneys.
- 2. Junction between two nerve cells.
- 3. Dome shaped muscle that inflates and deflates lungs.
- 6. Exchange of gas between alveoli and external environment.
- 9. Muscle group that runs along the spine.
- 10. A neuron that transmits impulses between other neurons.
- 12. Connective tissue of the nervous system.
- 13. Organ that supports the immune system.
- 15. A membrane that envelopes the lungs and covers the thorax.
- 16. A process that supports failing kidneys.