Human Body Systems

Front

What is the main function of the digestive system?

Back

To break down food into nutrients that the body can use.

Front

What is the role of the heart in the circulatory system?

Back

To pump blood throughout the body.

Front

Where does the oxygen in our blood come from?

Back

From the lungs after we breathe in.

Front

What is the purpose of the intestines in digestion?

Back

To absorb nutrients from food and dispose of waste.

Front

What happens to your heart rate when you exercise?

Back

It increases to supply more oxygen to the muscles.

Front

What is respiration?

Back

The process of taking in oxygen and expelling carbon dioxide.

Front

What is the function of the lungs?

Back

To exchange oxygen and carbon dioxide with the blood.

Front

What is the role of blood in the body?

Back

To transport oxygen, nutrients, and waste products.

Front

What is the first step of digestion?

Back

Chewing food in the mouth.

Front

What happens to your breathing rate when you rest after exercise?

Back

It decreases as your body relaxes.