Human Body Systems and Molecules

Front

What molecules can cells use?

Back

Cells can only use molecules that are small enough to enter a cell.

Front

What is the role of the respiratory system?

Back

The respiratory system brings in oxygen molecules from the air, which are small enough to fit into cells. It also sends out the carbon dioxide that the body releases

Front

How does the digestive system contribute to cellular function?

Back

The digestive system brings in food and breaks it down into smaller molecules, such as glucose and amino acids, that can fit into cells.

Front

What is the function of the circulatory system?

Back

The circulatory system transports glucose, oxygen, and amino acid molecules to every cell in the body.

Front

How do body systems work together in a functioning human body?

Back

In a functioning human body, body systems work together to deliver glucose, oxygen, and amino acid molecules to the cells in the body.

Front

What molecules are found in a healthy body cell and where do they come from?

Back

A functioning human body has molecules from food (glucose and amino acids) and molecules from air (oxygen) in its cells