Across
- 7. This goes up when your heart squeezes blood some 60 times in a minute
- 10. any of the many tiny air sacs of the lungs which allow for rapid gaseous exchange
- 12. a collection of the extra fluid that drains from cells and tissues in your body and isn't reabsorbed into your capillaries
- 13. a hollow, muscular tube inside the neck that starts behind the nose and opens into the larynx and esophagus
- 15. Where air first enters into the body and is warmed and moistened
- 16. small, bean-shaped organs that filter substances in your body and help fight infections
- 17. Tube that brings blood to the heart
- 19. Fights infections and exists in the blood
Down
- 1. delicate blood vessels that exist throughout your body. They transport blood, nutrients and oxygen to cells in your organs and body systems.
- 2. a cartilaginous tube that connects the larynx to the bronchi of the lungs
- 3. the right one receives blood from the body
- 4. A large airway that leads from the trachea (windpipe) to a lung
- 5. Tube that brings blood away from the heart
- 6. What you feel in your wrist or neck because of the change in blood pressure in you heart
- 8. Carries oxygen in the blood
- 9. small, colorless cell fragments in our blood that form clots and stop or prevent bleeding
- 11. hollow tube in the middle of your neck, just above your trachea (windpipe) and behind your esophagus
- 13. About half our blood is made of this mostly watery substance
- 14. The part of the heart that actually squeezes the blood
- 18. Prevents blood in the heart from going backwards