Skeletal
Muscular
Digestive/Endocrine
Cardiac
Anything...
100

This long bone is found in the thigh and is the largest bone in the human body.

What is the femur?

100

This muscle is the primary muscle for breathing. 

What is the diaphragm?

100

This organ begins the chemical digestion of carbohydrates using enzymes in saliva.

What is the mouth?

100

This organ pumps blood throughout the body.

What is the heart?

100

The number of chambers that the human heart has.

What is four?

200

This bone of the lower leg bears the majority of the body's weight and is the larger and stronger of the two lower-leg bones.

What is the tibia?

200

These muscles on the front of the upper thigh extend the knee. 

What are the quadriceps?

200

Food passes through this muscular tube to reach the stomach.

What is the esophagus?
200

This large vessel carries oxygenated blood from the heart to the body.

What is the aorta?

200

These tiny air sacs in the lungs allow gas exchange with the bloodstream.

What are the alveoli?

300

These 12 paired bones protect the heart and lungs.

What are the ribs?

300

This type of muscle tissue in involuntary and found in the walls of organs such as the intestines.

What is smooth muscle?

300

These glands are on top of the kidneys and regulate epinephryne and norepinephrine.

What are the adrenal glands?

300

The two valves that prevent backflow between the atria and the ventriles.

What are the AV(atrioventricular) valves?

300

This structure separates the thoracic cavity from the abdominal cavity.

What is the diaphragm?

400

The point where the clavicle, scapula, and humerus interact is known as this type of joint, capable of circumdunction.

What is a ball and socket joint (the shoulder joint)?

400

The number of muscles in the human body.

What is over 600?

400

The master gland, located at the base of the brain, regulates other glands and development of the nervous system.

What is the pititary gland?

400

These are the vessels around the heart.

What are coronary vessels?

400

These organs are responsible for filtering blood and producing urine.

What are the kidneys?

500

The small u-shaped bone in the neck that anchors the tongue's back while allowing the rest to move.

What is the Hyoid Bone?

500

The gastrocnemius and soleus muscles form this tendon, the strongest in the body.

The Achilles Tendon

500

These fingerlike projections in the small intestine increase surface area to maximize nutrient absorption.

What are villi?

500

This layer of the heart contains the muscular tissue responsible for contracting and pumping blood.

What is the myocardium?

500

This division of the autonomic nervous system is repsonsible for "fight or flight" responses.

What is the sympathetic nervous system?

M
e
n
u