Respiratory system path of air step by step

What is the first step of air entering the body?

Air enters through the nose or mouth.

What happens next after air enters?

Air travels down the trachea.

True or false: The trachea is also called the windpipe.

True, because the trachea is commonly known as the windpipe.

Where does the trachea split?

It splits into two bronchi, one for each lung.

Fill in the blank: The bronchi lead to ______.

the lungs.

What are the tiny air sacs in the lungs called?

They are called alveoli.

Difference between bronchi and alveoli.

Bronchi are larger airways; alveoli are tiny air sacs for gas exchange.

What role do alveoli play?

They exchange oxygen and carbon dioxide with the blood.

True or false: Oxygen moves into the blood from the alveoli.

True, because oxygen diffuses into the blood.

What is the purpose of the diaphragm?

It helps in inhaling and exhaling air.

What happens during inhalation?

The diaphragm contracts, creating space for air.

What is exhalation?

It is the process of breathing out carbon dioxide.

Where do gases exchange occur?

In the alveoli of the lungs.

What do the lungs do?

They help in breathing and gas exchange.

What is the role of the nasal cavity?

It filters, warms, and humidifies the air.

True or false: The alveoli are surrounded by blood vessels.

True, because they need to exchange gases with the blood.

What is the last step in the air pathway?

Air is expelled from the lungs.

Comparison: Inhalation vs. Exhalation.

Inhalation brings air in; exhalation pushes air out.

What happens to carbon dioxide in the alveoli?

It moves from the blood to the alveoli to be exhaled.