Human Body Systems

Front

What is the correct order of the levels of organization in the human body from smallest to largest?

Back

cell, tissue, organ, organ system

Front

What is the main function of the nervous system?

Back

To send and receive messages.

Front

What is the main organ of the nervous system?

Back

Brain

Front

What is the function of the digestive system?

Back

To break down food.

Front

What is the main organ of the digestive system?

Back

Stomach

Front

How do the respiratory and circulatory systems work together?

Back

The respiratory system brings in oxygen, and the circulatory system moves it around.

Front

What is an organ?

Back

A group of tissues that work together to perform closely related functions.

Front

What is the main function of the circulatory system?

Back

To pump blood around the body.

Front

What is the main organ of the circulatory system?

Back

Heart

Front

What is the function of the respiratory system?

Back

To bring oxygen into the body and remove carbon dioxide.