Respiratory System
Circulatory System
Skeletal System
Digestive System
Excretory System
100

The main organ of the respiratory system.  If you smoke, yours will get black.

What are the lungs?

100

This main organ of the circulatory system is about the size of your fist and pumps blood through your body.

What is your heart?

100
This part of the skeleton is composed of several bones and protects the brain.
What is the skull?
100

The main organ of the digestive system where food is mixed and stored.

That is the stomach?

100

The job of the excretory system is to keep the body's water balanced and remove this from your body.

What is waste?

200

This muscle at the bottom of your chest pulls down to let you inhale.

What is the diaphragm?

200

Blood picks up this gas, which all animals need to survive, from the lungs.

What is oxygen?

200
The leg bone which connects to the hip.
What is the femur?
200

When you chew a bite of food, your tongue mixes the food with this liquid which helps break down food.

What is saliva?

200

The bean-shaped organs that filter your blood.

What are kidneys?

300

Air enters your nose through this tube that leads to the bronchial tubes.

What is the trachea?

300

The large blood vessels that carries blood away from the heart.

What is an artery?

300

The number of bones in an adult human.

What is 206?

300

Your body has a large and small one of these organs where food goes after it leaves the stomach.

What are intestines?

300

The muscular bag that holds urine.

What is the bladder?

400

The lungs hold millions of these tiny air sacs.

What are alveoli?

400

These large blood vessels carry blood to the heart.

What are veins?

400
The internal, and spongy, portion of the bone that produces blood cells.
What is the marrow?
400

The muscular tue that pushes food toward the stomach.

What is the esophagus?

400

A solid mass formed in kidneys due to low fluid intake and high intake of protein, sodium, soda, and other things.

What is a kidney stone?

500
A disease in the lungs caused by breathing in harmful chemicals.
What is emphysema (or lung cancer)?
500

Arteries branch into these tiny, thin blood vessels.

What are capillaries?

500
The connection between the humerus an scapula in humans is this kind of joint.
What is a ball and socket joint?
500

The chemicals in saliva that help break down starch in foods.

What are enzymes?

500

A dialysis machine does this.

What is clean the blood?

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