First Aid

4. the route for air in and out of the lungs
7. blood vessels that carry blood away from the heart
8. a pair of organs which filter blood and produce urine
9. a part of the eye which focuses light rays on the retina
11. the muscular lower chambers of the heart which pump blood into the arteries
14. bones of the palm of the hand
15. the structure of the body
17. an opening in the neck through which the person breathes
18. a tough cord of tissue which connects bone to bone
19. a substance used to cause vomiting
20. broken blood vessels under the skin

1. a cord made up of fibres which carry nerve impulses to and from the brain
2. the bone of the lower jaw
3. high blood pressure
5. inflammation due to microbes
6. the bone of the knee cap
10. a jagged wound from a rip or tear
12. bones of the arch of the foot; between the ankle and toes
13. the outermost layer of the skin
16. a tube for air, kept open with cartilage rings; is located between the larynx (voice box) and the bronchi