Review: The Respiratory System

Front

Where does oxygen initially enter into the body?

Back

Nose and mouth.

Front

What is the purpose of the respiratory system?

Back

Takes in oxygen and releases carbon dioxide.

Front

What do humans need to breathe in from the air?

Back

Oxygen.

Front

These tiny grape-like air sacs is where the gas exchange of oxygen and carbon dioxide happen in the lungs. What is it?

Back

Alveoli.

Front

What are the two main branches from the trachea (one to each lung)?

Back

Bronchi.

Front

What is the trachea?

Back

The windpipe that connects the throat to the lungs.

Front

What is the diaphragm?

Back

A muscle that helps in breathing by contracting and relaxing.

Front

What is the role of bronchioles?

Back

They are small air passages that lead to the alveoli.

Front

What gas do we exhale?

Back

Carbon dioxide.

Front

What is the function of the nasal cavity?

Back

To filter, warm, and moisten the air we breathe.