Skeletal
Muscular
Cardiac
Nervous
Digestive
100

The number of bones in the human body.

What is 206?

100

The formal name of the muscle on one's "backside".

What is gluteus maximus?
100

The two great vessels bring deoxygenated blood back to the heart

What are Superior and Inferior Vena Cava?

100

The lobe of the brain that sits above the ears.

What is the temporal lobe?

100

The second part of your small intestine.

What is the jejunum?

200

The number of cervical vertebrae.

What is 7?

200

Most common sign or symptom of a muscular disorder. 

What is weakness?

200

The tissue that forms a loose-fitting sac around the heart.

What is the pericardium?

200

The name of the biggest part of the human brain.

What is the cerebrum?

200

The wave-like motion that moves food through the esophagus to the stomach.

What is peristalsis?

300

The process by which bones form.

What is ossification?

300

The specialized tissue that is attached to bones and allows movement.

What is skeletal muscle?

300

The top number of a blood pressure reading.

What is systolic?

300

The colored part of the human eye that controls how much light passes through the pupil.

What is the iris?

300

Increased surface area for absorption of nutrients in the small intestine.

What is villi?

400

The number of types of bones in the human body.

What is four?

400

The neurotransmitter for muscle contraction.

What is Acetylcholine (ATP)?
400

Vessels where the exchange of gases, nutrients, and waste takes place.

What are capillaries?

400

This is released at the gap to signal the next neuron.

What is a neurotransmitter?

400

Organs of the Biliary System.

What is liver, gallbladder, and ducts?

500

Bone cells that develop new bone. 

What are osteoclast cells?

500

A fibrous protein that forms (together with actin) the contractile filaments of muscle cells and is also involved in motion in other types of cells.

What is myocin?

500

Comes after the left atrium in the path of blood.

What is the bicuspid valve?

500
The junction between two neurons.

What is a synapse?

500

The most important digestive enzyme for breaking down food.

What is pepsin?