1. The Respiratory System
Chapter 16, Lesson 1

2. Vocabulary Breathing Respiratory system Pharynx Epiglottis Larynx
Vocal cords
Trachea
Bronchi
Lungs
alveoli
gas exchange
diaphragm
inhalation
exhalation

3. Breathing
The movement of air into and out of the lungs

4. Respiratory System
A system of organs that brings oxygen into your body.

5. Pharynx
A tubelike passageway at the top of the throat that receives air, food and liquids from the mouth or nose.

6. epiglottis
A flap of tissue at the lower end of the pharynx that keeps food and liquids from entering the rest of the respiratory system.

7. larynx
A triangle-shaped area through which air passes from the pharynx; also known as the voice box

8. Vocal cords
Two thick folds of tissue in the larynx that vibrate and make sounds as air passes over them

9. Trachea
A tube that is held open by c-shaped rings of cartilage

10. Bronchi
Two narrow tubes that branch off of the trachea and lead into the lungs
Singular: bronchus

11. Bronchioles (THIS WAS LEFT OFF OF YOUR LIST BUT YOU NEED TO KNOW IT)
Smaller tubes that branch off of the bronchi

12. alveoli
Microscopic sacs, or pouches, at the end of the bronchioles where gas exchange occurs

13. Lungs
The main organs of the respiratory system made of sponge-like tissue

14. gas exchange
The process in which oxygen from the alveoli moves into the blood, and carbon dioxide from the blood moves into the alveoli

15. diaphragm
The large muscle below the lungs that contracts and relaxes and moves air in and out of the lungs

16. inhalation
The process in which air rushes into the lungs when the air pressure in the chest cavity is reduced

17. exhalation
The process in which air rushes out of the lungs when the air pressure in the chest cavity increases