WWA - Week 3 - Vocabulary
Across
- 2. The red liquid containing oxygen and nutrients that pumps through the veins and arteries of humans and many other animals.
- 4. Blood vessels that carry blood back to the heart.
- 7. A wall of muscle that separates the chest and abdomen in humans and certain animals.
- 8. A tiny blood vessel where substances are exchanged between the blood and the body cells.
- 10. The organ that pumps blood through the body of a person or animal.
Down
- 1. A gas that is expelled from the body by the respiratory system.
- 3. A group of parts that work together as a whole.
- 5. Blood vessels that carry blood away from the heart.
- 6. The tube that carries air to the lungs in humans and other animals that breathe air; windpipe.
- 9. Main organs of the respiratory system. They bring oxygen to the body and get rid of carbon dioxide.