Unit 5 - The Respiratory System

(1) is the process of taking in oxygen and getting rid of carbon dioxide.
The actions of the respiratory system are (2) .
(3) is the gas found in air that is necessary for life.
You draw in air when you (4) .
(5) is the gas that leaves the body when you breathe out.
You force air out of the body when you (6) .
Air enters the body through the mouth and (7) .
(8) is a sticky substance which lines the airways moistening air and trapping dust and germs.
The (9) is the back of the throat where the nasal passages and mouth meet.
The top of the wind pipe is called the (10) and is where the vocal cords are located.
The wind pipe is called the (11) .
The (12) are the two large branches of the wind pipe reaching into the lungs.
The smaller branches of the respiratory system are called (13)
The (14) are small sacs which do the work of exchanging gases.
The fleshy lobes of alveoli are called (15) .
The (16) is the large smooth muscle which inflates the lungs by changing the air pressure of the chest.
The (17) covers the trachea and keeps food from entering the airways while you eat.
(18) Frequent hand washing can reduce the likelihood of getting the common cold.
(19) Asthma is an infection that people can catch.
(20) Bronchitis is an infection of the nose and throat.
(21) Pneumonia needs medical treatment because it is an infection of the lungs.
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