The job of the digestive system is to take the food that you eat and convert it over to nutrients that your body needs in order to live. When that is accomplished, it has to eliminate any waste that may be left over.

Your small intestine does most of the work

The digestive system has more cases of cancer than any other organ in your body

RBCs have no nuclei.

The hear can beat for 3 to 5 minutes outside the body.

Red blood cells (RBCs) are 8 microns in size.

Each of your lungs contains about 300 million balloon-like structures called alveoli, which replace the carbon-dioxide waste in your blood with oxygen.

Allows you to talk and smell as well as breathe

Lungs are the only organ that can float on water

The endocrine system is responsible for (1) the reproductive system, (2) growth and development, (3) homeostasis, (4) and metabolism.

The endocrine system consists of a series of organs and glands throughout the body that produce, store, and secrete special messengers.

Messengers are hormones that travel through the blood to specific target cells throughout the body.

Muscles make up 40% of the body’s weight

The skeletal system is made up of 206 bones

Provides our body with movement, stability, shape and support.

The brains uses more of the bodies energy than any of its other organs

The nervous system can transmit signals at speeds of 328 feet (100 meters) per second

There is over 100 billion nerve cells in the brain

is your body's defense system.

fights infections and diseases.

NEEDS SLEEP. REQUIRES SLEEP.

male reproductive system consists of testes

female reproductive system includes ovaries

The reproductive system is a collection of internal organs and external genitalia that work together to generate new life.