The number of chambers in the human heart.
four
This scientist discovered penicillin by accident.
Alexander Fleming
Your body’s largest organ.
the skin
This gas makes up most of the air we breathe.
nitrogen
This part of the brain controls balance and coordination.
The cerebellum
The smallest bone in the human body, found in the ear.
stapes
This disease was the first to be completely eradicated by vaccination.
smallpox
This metal is in your blood and makes it red
iron
This organ can regenerate itself, even if part is removed
the liver
The “thinking” part of the brain, responsible for problem-solving and decision-making.
the frontal lobe
The muscle that helps you breathe.
the diaphragm
Ancient doctors believed health was based on balancing four things called these.
the four humors
This animal can regrow its limbs, inspiring medical research.
a salamander (or axolotl)
This part of your body has the fastest healing cells
the tongue (or mouth lining)
This area processes emotions like fear and aggression.
The Amygdala
The body system that includes skin, hair, and nails.
the integumentary system
This nurse is known as the founder of modern nursing.
Florence Nightingale
This is the only bone in the human body not connected to another bone.
the hyoid bone
The strongest muscle in the body relative to size.
the masseter (jaw muscle)
This part connects the brain to the spinal cord and controls breathing and heartbeat.
the brainstem
The part of the digestive system where most nutrient absorption happens.
the small intestine
This ancient civilization used honey to treat wounds because of its antibacterial properties.
Ancient Egypt
This body part continues to grow throughout your whole life
your ears and nose
This part of your body has no blood vessels and gets oxygen directly from the air.
the cornea of the eye
This lobe processes vision
the occipital lobe