Circulatory
Respiratory
Digestive
Excretory
Random!
100

This is the main organ of the circulatory system.

What is the heart?

100

This is the organ we use to breathe.

What is the lungs?

100

This is the first part of the digestive system where food enters.

What is the mouth?

100

This organ is primarily responsible for filtering waste from the blood.

What are the kidneys?

100

This organ is filled with acid that helps breakdown food.

What is the stomach?

200

These are a type of blood vessel that carries blood away from the heart.

What are arteries?

200

This is the tube that connects the throat to the lungs.

What is the trachea (or windpipe)?

200

This organ produces bile to help digest fats.

What is the liver?

200

This is the tube that carries urine from the kidneys to the bladder.

What is the ureter?

200

This is the largest artery in your body.

What is the aorta?

300

This is the liquid part of blood that carries nutrients and waste.

What is plasma?

300

This is a muscle that helps us breathe by contracting and relaxing.

What is the diaphragm?

300

This is the long tube that connects the stomach to the large intestine.

What is the small intestine?

300

This organ stores urine until it is ready to be expelled.

What is the bladder?

300

These two organs systems work together like best friends to give the body oxygen and nutrients.

What are the respiratory and circulatory system?

400

These are the blood vessels that allow oxygen and nutrients to pass to the cells. (Hint: They're tiny.)

What are capillaries?

400

These are tiny air sacs in the lungs where gas exchange occurs.

What are alveoli?

400

This is the part of the digestive system is responsible for absorbing water from waste.

What is the large intestine?

400

This is a form of excretion where water leaves through the skin.

What is sweating?

400

This is the part of your throat where air escapes the lunch. Another name for this organ is the voice box.

What is the larynx

500

These are the blood vessels that send oxygen-poor blood to the lungs.

What are veins?

500

This type of gas escapes your lungs every time you exhale.

What is carbon dioxide?
500

This is the process of breaking down food into smaller molecules.

What is digestion?

500

This is a form of excretion where carbon dioxide escapes the lungs.

What is exhaling?

500

This is the type of digestion that involves enzymes breaking down food molecules.

What is chemical digestion?