Main Function: The Main function of the respiratory system is to transport oxygen through the body and eliminate extra Carbon Dioxide.

Fun Facts:

• Some air in your lungs never leaves your body.

• It is possible to live only one lung.

• Your nose is a heater, filter, and humidifier

The respiratory system is essential because it transports vital oxygen to your body, your cells need oxygen to survive and operate, and the respiratory system takes it to them.

• Heart

• Lungs

• Veins

• Arteries

Main Purpose:

The main purpose of the circulatory system is to transport oxygen, nutrients, and hormones through the body and get rid of waste products such as carbon dioxide.

Three fun facts:

• During the average lifetime, a heart pumps 1 million barrels of blood, enough to fill more than 3 super tankers.

• The heart pumps about 100 gallons of blood through the body each hour – enough to fill 1,600 drinking glasses.

• Blood takes about 20 seconds to circulate through the entire vascular system.

The circulatory system is essential because it transports vital nutrients, oxygen, and hormones to organs and tissues to use as energy to grow and repair.

• Mouth Cavity

• Esophagus

• Stomach

• Liver

• Gallbladder

• Pancreas

• Large Intestine

• Small intestine

• Rectum

• Anus

Main Function:

The main function of the digestive system is to absorb, digest its nutrients, and excrete waste products.

Fun Facts:

• Your body can move your food through the digestive system even while you are standing on your head. It is not connected to gravity because it works with muscles.

• The average person produces 2 pints of saliva every day. That is 32 ounces, or 2 cans of soda.

• The muscles in your esophagus act like a giant wave. That is what moves food or drinks down to your stomach. This wave action is called peristalsis.

Importance:

The importance of the digestive system is to use what the body consumes, and turn it into energy. Without it, we would not be able to get nutrients and energy from food.

• Brain

• Spinal Cord

• Nerves

Main Function:

The main Function of the nervous system is to send messages from all over the body to the brain, and the brain sends messages back in order to tell them what to do.

Fun Facts:

• Neurons have different shapes depending on their purpose and where they are from.

• Neurons are programmed to do different things. - Sense, - Move, - Recept,

• The brain uses more of the body’s energy than the rest of the organs, using over 20% of the energy reserves in the body.

The Nervous system is essential because it tells all of our body what to do and when do to it. We need it to control our body, without it we could not move or speak.

• Hypothalamus

• Pituitary Gland

• Pineal Gland

• Thyroid & parathyroid glands

• Pancreas

• Adrenal Glands

• Thymus

• Testicle (In Male)

• Ovary (In Female)

Main Function:

The Endocrine System realeses hormones, endocrine hormones help control mood, growth, the way our organs work, metabolism, and reproduction.

Fun Facts:

• Diabetes was once diagnosed by tasting urine

• Alcohol has widespread effects on the endocrine system

• An early endocrinologist attempted hormone replacement therapy on himself

The Endocrine system is essential because it is the thing that allows a human to grow, reproduce, and make our organs work. Without it, we wouldn't be able to do seemingly basic things.

• Cardiac Muscle

• Skeletal Muscle

• Smooth Muscle

Main Function:

The muscular system is attached to the bones, it is the system responsible for the movement.

Fun Facts:

• Muscles make up about 40 percent of your total body weight

• Some of your busiest muscles are those controlling eye movements

• Muscles usually work in pairs

The muscular system is essential because it is the thing that is responsible for our movement, without it, we wouldn't be able to move.

• Skull

• Rib Cage

• Arms

• Hands

• Spine

Main Function:

It has the function of maintaining the structure of the body, make blood cells, and provides protection for your organs.

Fun Facts:

• The adult human body has 206 of them.

• There are 26 bones in the human foot.

• The human hand, including the wrist, contains 54 bones.

The Skeletal System is essential because it is what holds the bodies structure, without it, we would just be a blob of organs and muscles.