Circulatory
Respiratory
Digestive
Nervous
Skeletal and Muscular
100

These disc shaped cells carry oxygen around the body.

What are red blood cells?

100

These sacs are where oxygen is passed into the bloodstream.

What are alveoli?

100

The average person produces 2 pints of this oral fluid per day.

What is saliva?
100

These special cells send electrical and chemical signals between the brain and the rest of the body.

What are neurons?

100

This soft tissue connects bone to bone.

What is a ligament?

200

This protein found in red blood cells is what gives blood its red color.

What is hemoglobin?

200

These tubes are the location of inflammation for individuals with asthma.

What are bronchial tubes?

200

Contrary to its name, this organ is actually longer than its counterpart with a larger name. 

What is the small intestine?

200

The brain is hard at work, even during this restful time.

What is sleeping?

200

This soft tissue connects muscle to bone?

What is a tendon?

300

These tiny tubes are where oxygen and carbon dioxide is exchanged.

What are capillaries?
300

This muscle, when spasming, causes hiccups.

What is the diaphragm?

300

It can take anywhere from 2 to 5 seconds for food to make it's way down this tube.

What is the esophagus?

300

This brain injury is caused by a bump, blow, or jolt causing the head and brain to move back and forth.

What is a concussion?

300

This joint, found in the shoulder and hip, allows for a wide range of motion.

What is ball and socket joint?

400

Starting out fast and slowing as you age, this metric is used to determine heart health. 

What is the heart rate?

400

This flap keeps food and other objects out of the air passages.

What is the epiglottis?

400

This acid produced by the body is the same level of acidity in the substance used by masons to clean bricks. 

What is stomach acid?

400

This system consists of the brain and spinal cord.

What is the Central Nervous System?

400

This jokester is the largest bone found in the arm.

What is the humerus?

500

This artery carries the most blood away from the heart and is the diameter of a garden hose.

What is the aorta?

500

This side of the balloon-like bags has more lobes than the other side.

What is the right lung?

500

Your digestive system plays host to over 500 different species of this important organism.

What are bacteria?

500

This system controls process outside of a person's conscience and regulates many body processes.  

What is Involuntary Nervous System?

500

The smallest bones in the human body are found here.

What is the inner ear?

M
e
n
u