This is the main organ of the nervous system.

The muscle that regulates the flow of blood in the human body.

Longest bone in the human body.

The kind of muscle that the heart is.

This organ is approximately 20 feet long.

The largest section of the brain that that enables us to think and learn.

Largest artery in the body that delivers blood with oxygen to the rest of the body.

These protect the heart and lungs.

Smooth muscles are found here in the human body.

Solid food waste passes through this opening to exit the body.

The area of the brain responsible for voluntary muscle coordination.

This artery carries blood without oxygen from the right ventricle to the lungs, where the blood will recieve oxygen.

Humans are born with around this many bones.

Muscles we do not consciously control.

The tube that leads from the mouth to the stomach.

A thick bundle of nerve fibers in a protective covering that relays impulses between the brain and other parts of the body.

The best place on your body to measure your heart rate or pulse.

An area in the body where two bones meet.

This type of action in a muscle causes movement.

This begins the digestion of food in the mouth.

The side of the brain that controls movement on the right side of the body.

This part of the blood fights off infection.

The most common mineral that bones are made of.

This attaches a muscle to a bone.

This is in the stomach and aids further with digestion.