Show:
Digestive and Excretory System
Respiratory System
Circulatory System
Nervous System
Musculoskeletal System
100
This is the little organ located beneath the liver.
What is the gallbladder?
100
These two gases are being exchanged in the respiratory system.
What are oxygen and carbon dioxide?
100
This is the main organ of the circulatory system.
What is the heart?
100
This is the main organ of the nervous system.
What is the brain?
100
These attach muscles to the bones for movement.
What are tendons?
200
These chemicals break down food into nutrients.
What are enzymes?
200
This thin and elastic muscle allows your lungs to take air in and breathe air out.
What is the diaphragm?
200
These tubes move blood away from the heart.
What are the arteries?
200
These tiny organs sense changes around you (like smell, touch, and taste) and send the information to your brain.
What are receptors?
200
This holds your body up and gives it shape.
What is the skeleton?
300
This organ can also be called the colon.
What is the large intestine?
300
This tube moves air into your lungs from your throat.
What is the trachea?
300
These cells carry gases in your blood.
What are red blood cells?
300
Almost all nerves go here first before they are sent on to the brain.
What is the spinal cord?
300
This forms where two bones connect.
What is a joint?
400
These tubes take the urine from the kidneys and take it to the bladder.
What are the ureters?
400
These air sacs exchange gases with the blood and look like little bundles of grapes.
What are the alveoli?
400
This is what scientists call the movement of blood around your body.
What is circulation?
400
These are chemical messengers that are much slower than the information sent through nerves.
What are hormones?
400
This is another name for shorten, like when your muscles shorten.
What is contract?
500
This tube transports the food that you chew to the stomach.
What is the esophagus?
500
These are the smallest tubes in your lungs.
What are the bronchioles?
500
These cells in your blood fight off infection.
What are white blood cells?
500
If you damage one of these, it won't be able to repair itself, so take care of all of them!
What are nerves (or brain cells)?
500
This is a very fast muscle contraction, and happens automatically.
What is a muscle reflex (or reflex)?