Skeletal System
Digestive System
Respiratory System
Circulatory System
Working Together
100
This part of the skeleton is composed of several bones and protects the brain.
What is the skull?
100

These structures, also part of the skeletal system, crush what has entered the mouth.

What are the teeth?

100

The balloon like sacs that inflate and deflate, bringing air into and out of the body.

What are the lungs?

100
These disc shaped cells transport oxygen from the lungs to the other parts of the body.
What are red blood cells?
100

These two systems work together to deliver oxygen to the body.

What are the respiratory system and the circulatory system?

200
The leg bone which connects to the hip.
What is the femur?
200
Food travels down this long tube from the mouth to the stomach.
What is the esophagus?
200
Small sacks in the lungs which allow oxygen and carbon dioxide to move between the lungs and blood stream.
What are aveoli?
200
Double Jeopardy: These blood cells are a vital part of the body's immune system.
What are white blood cells?
200

These hard structures form a protective cage around your lungs and heart, keeping these vital organs of the circulatory and respiratory systems safe.

What are the ribs?

300

The hip and shoulder joints in humans are examples of this kind of joint.

What is a ball and socket joint?

300

The organ where water is absorbed during digestion.

What is the large intestine?

300

This element is in the air we breathe and we need it to survive.

What is oxygen?

300
The chamber in the heart that pushes blood out of the heart and to the other parts of the body.
What is the ventricle?
300

These are the tiny air sacs in the lungs where oxygen enters the circulatory system and carbon dioxide leaves it. 

What are the alveoli?

400
The internal, and spongy, portion of the bone that produces blood cells.
What is the marrow?
400
Double Jeopardy: This chemical aids in digestion by speeding up chemical reactions.
What is an enzyme?
400

This molecule is exhaled by animals, but plants "breathe" it in and use it to produce oxygen.

What is carbon dioxide?

400

The blood vessels that carry blood away from the heart.

What are arteries?

400

These act like levers that work with your muscles to allow your body to move and walk.

What are bones?

500

You were born with 300 of these, but as an adult you only have 206.

What are bones?

500
The name for the soft tissue that hangs down in the back of the mouth.
What is a uvula?
500

A disease in the lungs caused by breathing in harmful chemicals.

What is emphysema (or lung cancer)?

500

These are the smaller chambers of the heart that receive blood from elsewhere in the body.

What are the atria (singular: Atrium)?

500

These are the tiny blood vessels where the actual exchange of oxygen and nutrients happens with your cells.

What are capillaries?

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