7 Respiratory System

What is the function of the respiratory system?

• To breathe

• To get oxygen to the blood stream

• To release carbon dioxide

• To give the body structure

How does air get into the body?

• inhaling

• exhaling

• eating

• sleeping

In what order does air enter the body?

• nose 2. trachea 3. diaphragm

• mouth and nose 2. lungs 3. trachea

• nose and mouth 2. trachea 3. lungs

Where does the oxygen get into the blood?

How does oxygen get to the cells?

• in the air

• in the blood

• in the digestive system

What part of the body needs oxygen to make energy?

• the cells

• the brain

• the heart

• the blood vessels

What is produced when cells use the oxygen?

• water

• energy

• oxygen

• carbon dioxide

What carries the carbon dioxide around the body?

• the digestive system

• the nervous sytem

• the circulatory system

Oxygen gas is...

• CO₂

• O₂

• O

Carbon dioxide is...

• O₂

• CHO₂

• CO₂