Which System is It?
Name that Organ.
Levels of Organization
100

External covering of the body, or the skin, including hair & fingernails.

Integumentary System

100

The part of the body where food enters, and digestion begins.

What is the mouth?

100

At this level, atoms combine to form molecules. 

What is the chemical level or atomic level. 

200

Keeps the body supplied with oxygen and removes carbon dioxide.

What is the respiratory system.

200

After traveling down the esophagus, food stops here and is mixed with strong acids.

What is the stomach?

200

This level is made of molecules. 

What is the cellular level. 

300

Produces the waste products the body disposes of. 

What is the urinary system. 

300

In this tube you will find the solids remaining, after food nutrients are absorbed into the blood stream.

What is large intestine?

300

In this level, different organs work together closely.

What is the organ system level.

400

Provides structure, allows movement, and protects the organs of the body. 

What is the skeletal system.

400

What is the purpose of the digestive system?

To extract nutrients from food, and get rid of waste.

400

Consists of different types of cells.

What is the tissue level.

500

Complements the cardiovascular system. Helps cleanse the blood and houses white blood cells. 

What is the lymphatic system. 

500

where does digestion begin?

What is in the mouth?

500

Made up of different types of tissues.

What is the organ level.