Across
- 3. This muscle in your upper arm helps bend your elbow.
- 4. The upper chamber of the heart that receives blood returning to the heart.
- 6. This blood vessel that carries blood away from the heart.
- 7. This is the largest artery in the body, carrying oxygenated blood from the heart to the rest of the body.
- 10. This digestive tube connects your mouth to your stomach.
- 11. A type of blood vessel that carries blood toward the heart.
Down
- 1. A protein in red blood cells that carries oxygen.
- 2. These tiny vessels connect arteries to veins and allow exchange of gases and nutrients.
- 5. This muscular heart chamber pumps blood out to the lungs or body.
- 7. These tiny air sacs in the lungs are where oxygen and carbon dioxide are exchanged.
- 8. This type of cell sends messages through your nervous system.
- 9. The watery part of blood that carries nutrients, hormones, and waste.