Human Body Systems

Front

Where does digestion start?

Back

Digestion starts in the mouth, where food is chewed and mixed with saliva.

Front

What important substance is replenished as blood flows through the heart?

Back

Oxygen is replenished as blood flows through the heart.

Front

Which part of your digestive system absorbs nutrients into your bloodstream?

Back

The intestine absorbs nutrients into your bloodstream.

Front

Your lungs are part of which body system?

Back

The lungs are part of the respiratory system.

Front

Which system pumps blood through your body?

Back

The circulatory system pumps blood through your body.

Front

What is the main function of the respiratory system?

Back

The main function of the respiratory system is to take in oxygen and expel carbon dioxide.

Front

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

Back

The heart pumps blood throughout the body.

Front

What do the intestines do in the digestive system?

Back

The intestines break down food and absorb nutrients.

Front

What is the function of the lungs?

Back

The lungs allow us to breathe in oxygen and breathe out carbon dioxide.

Front

What is blood made of?

Back

Blood is made of red blood cells, white blood cells, platelets, and plasma.