Respiratory and Circulatory System

Front

What is the main function of the respiratory system?

Back

Gas exchange: getting oxygen into the body and carbon dioxide out.

Front

Why do we need oxygen?

Back

To help our cells get energy out of food.

Front

What are capillaries?

Back

Small blood vessels where gas exchange occurs, allowing red blood cells to pass through one at a time.

Front

What are alveoli?

Back

Structures in the lungs where gases are exchanged.

Front

What happens to the carbon dioxide levels in the air we breathe out compared to the air we breathe in?

Back

The air we breathe out has more carbon dioxide than the air we breathe in.

Front

What is the role of hemoglobin in the circulatory system?

Back

Hemoglobin binds to oxygen in the lungs and carries it to the body's tissues.

Front

What is the pathway of air through the respiratory system?

Back

Nose/Mouth -> Trachea -> Bronchi -> Bronchioles -> Alveoli.

Front

What is the diaphragm's role in breathing?

Back

The diaphragm contracts to allow air to enter the lungs and relaxes to push air out.

Front

What is the difference between inhalation and exhalation?

Back

Inhalation is the intake of air into the lungs; exhalation is the expulsion of air from the lungs.

Front

What is the significance of the surface area of alveoli?

Back

The large surface area of alveoli allows for efficient gas exchange.