Levels of Organization
Circulatory System
Muscular System
Nervous system
Respiratory System
100

The basic unit of life

What is the cell?

100

These are channels that transport blood through your body.

What are blood vessels? 

100

This system works with the muscular system to help the body move and stand.

What is the skeletal system?

100

This organ is responsible for controlling breathing, movement, thought, and voluntary and involuntary movement. 

What is the brain?

100

The lungs belong in this system.

What is the respiratory system?

200

The lungs belong in this category.

What is organ?

200

This organ is divided into 4 parts: 2 atria and 2 ventricles.

What is the heart?

200

These work together with the skeletal system to help your body move.

What are muscles?

200

This organ is located in the backbone and holds all of the nerves that help control movement, thought and everything else in your body.

What is the spinal cord?
200

These organs are located at the end of the bronchioles where gas exchange takes place.

What are the alveoli? 

300

The Circulatory System belongs in this category.

What is Organ System?
300

These are the chambers in the heart responsible for pumping the blood.

What are ventricles?

300

These muscles are located on your back by the shoulders.

What are trapezius.

300

These send signals from the spinal cord to the rest of your body.

What are nerves?

300

These are the smallest main passageways coming off the bronchi.

What are the bronchioles? 

400

Muscular tissue belongs in this category.

What is tissue?

400

This blood vessel transports blood away from the heart.

What are the arteries? 

400

These muscles are located on your upper arms.

What are your biceps?

400

These use electrical and chemical signals to send information between different areas of the brain, as well as between the brain, the spinal cord, and the entire body

What are neurons?

400

This is the hollow tube that connects the larynx with the right and left bronchus. Also called the wind pipe.

What is the trachea?

500

Frog belongs in this category.

What is Organism?

500
These carry deoxygenated blood towards the heart.

What are veins?

500

These muscles are located on your upper leg.

What are the quadriceps?

500

This uses more of the body’s energy than the rest of the organs, using over 20%

What is the brain?

500

This is also knows at the voice box.

What is the larynx?