This little pouch located where the small intestines joins the large intestine has no known purpose in our bodies.
What is the appendix?
100
This is the gap between neurons.
What is a synapse?
100
This flap is at the top of the larynx. It prevents food from entering the windpipe.
What is the epiglottis?
100
This liquid is mostly water and makes up more than half of the blood.
What is plasma?
200
This is the longest bone in the human body.
What is the femur?
200
Contraction and relaxation of the muscles in the esophagus is called this.
What is peristalsis?
200
An action that happens automatically and does not involve the brain.
What is a reflex?
200
The trachea is divided into two of these.
What are bronchial tubes?
200
Blood returns to the heart through these.
What are veins?
300
This flexible and tough connective tissue is found in the tip of the nose, outer ear and wherever two bones meet.
What is cartilage?
300
This holds the bile that is produced in the liver.
What is the gallbladder?
300
The largest part of the brain. It controls learning, memory, and reasoning.
What is the cerebellum?
300
When your diaphragm relaxes you do this.
What is exhale?
300
This is the largest artery in the body.
What is the aorta?
400
This mineral makes bones tough and hard.
What is calcium?
400
This is how long food remains in the stomach.
What is 4-6 hours?
400
This part of the nervous system is responsible for the functions necessary for life, such as heartbeat, breathing and blood pressure.
What is the medulla?
400
This waste product is given off during gas exchange between air and blood in the alveoli.
What is carbon dioxide?
400
The two lower chambers of the heart are called this.
What are the ventricles?
500
Bones include about 30% living tissue, including bone cells, blood, blood vessels, nerves and fat. The center of a bone has a space or cavity containing this soft tissue.
What is bone marrow?
500
These finger-like structures line the inner wall of the small intestine.
What are villi?
500
Brings messages to the cell body.
What are dendrites?
500
Vocal cords, which produce the sounds of voices are contained here.
What is the larynx?
500
These help the blood clot and seal the cut in the blood vessel.