RESPIRATION

Respiration is the process by which we breathe in, or inhale, to obtain the oxygen our body needs, and we breathe out, or exhale, to expel the carbon dioxide our body produces.

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the air enters through the...

• nostrils

• pharynx

• oesophagus

• larynx

The trachea is divided into two branches called...

• bronchioles

• lungs

• bronchi

Inside the lungs, the bronchi are divided into smaller

branches called ...

• lungs

• bronchioles

Air sacs are moist surfaces in the lungs where gas exchange takes place

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Lungs

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Bronchi

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Bronchioles

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