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Science 8: Respiratory System

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Science 8: Respiratory System

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Science 8: Respiratory System

Science 8: Respiratory System

Tharwat A
1

out dioxide Carbon respiratory oxygen lungs oxygen cells

The in our bodies need to stay alive . is made in our bodies as cells do their jobs .

The and system allow in the air to be taken into the body , while also letting the body get rid of carbon dioxide in the air breathed .

2

not chemical all

Respiration is the same as breathing , and is a process which occurs in of your cells .

3

bronchioles alveoli bronchi capillaries trachea

How does oxygen travel into blood ?

Air is breathed into the lungs through the windpipe called the .

The trachea divides into two tubes called the .

The bronchi divides into many tubes called .

The bronchioles divide until they end up in tiny air sacs called . There are millions of alveoli found within the lungs .

These alveoli are surrounded by a network of , allowing for oxygen and carbon dioxide to be exchanged between the blood in the capillaries and the air in the lungs . The oxygen molecules are carried in red blood cells .

The exchange of these two gasses occurs by a process called diffusion .