Skeletal System
Circulatory System
Digestive System
Nervous System
Respiratory System
100

Number of bones in the adult human body.

What is 206?

100

The main organ of the Circulatory System

What is the heart?

100

The stretchy tube that brings food to the stomach

What is an esophagus?

100

The two parts of the Central Nervous System

What is the brain and the spinal cord?

100

The main organ of the Respiratory System

What are lungs?

200

Protects your organs.

What are the ribs?

200

The blood vessels where gas exchange takes place.

What are capillaries?

200

Produces bile that helps you digest fats.

What is the liver?

200

Functions in the body without you thinking about them.

What is involuntary?

200

The waste product you breathe out

What is carbon dioxide?

300

The largest or heaviest bone in the body

What is the femur or thigh bone?

300

Carries oxygenated blood from the heart.

What are arteries?

300

Where most digestion takes place

What is the small intestine?

300

Electrical impulses travel down this part of a nerve cell.

What is an axon?

300

Prevents food from entering the trachea

What is epiglottis?

400

Where the smallest bone in the body is found.

What is the ear?

400

Carries deoxygenated blood back to the heart.

What are veins?

400

The ball of chewed up food mixed with saliva.

What is a bolus?

400

A nerve cell.

What is a neuron?

400

Group of tiny air sacs when gas exchange occurs through capillaries. 

What are alveoli?

500

The name of the kneecap.

What is the patella?

500

The main artery that carries blood away from your heart to the rest of your body.

What is aorta?

500

A mixture of partially digested food and digestive juices in the stomach

What is the chyme?

500

The part of a nerve that receives a message.

What are dendrites?

500

What happens to your diaphragm when you inhale.

What is contracts or flattens out?

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