Ex. 21. Read and translate text B.

Ex. 22. Read the sentences below and answer the question: What is it?

1. The main muscle used for breathing; separates the chest cavity from the abdominal cavity.

2. The tube through which food passes from the mouth down into the stomach.

3. The muscular organ that pumps blood throughout the body.

4. Thin sheets of muscle between each rib that expand (when air is inhaled) and contract (when air is exhaled).

5. Interior area of the nose; lined with a sticky mucous membrane and contains tiny, surface hairs called cilia.

6. Voice box.

7. The two organs that extract oxygen from inhaled air and expel carbon dioxide in exhaled air.

8. These muscles help move the diaphragm up and down for breathing.

9. The two main air passages into the lungs.

10. Bones attached to the spine and central portion of the breastbone, which support the chest wall and protect the heart, lungs, and other organs in the chest.

11. Located at the entrance of the nose, these hairs trap large particles that are inhaled.

12. Air spaces within the skull.

13. A flap of cartilage that prevents food from entering the trachea (or windpipe).

14. Area of the brain that controls breathing.

15. Covering the lung and lining the chest cavity, this membrane has 2 thin layers.

16. Pulmonary arteries carry deoxygenated blood from the heart and lungs; pulmonary veins carry oxygenated blood back to the heart.

3.

Дата добавления: 2015-07-20