Human Body Systems

A body system is a group of organs and tissues that work together to do a job for the body, such as circulating blood or digesting food.

They interact or work together so that the body can perform many different functions such as breathing and moving. Your body would not work if the systems did not work together.

When we chew our food it helps us physically break down the food into smaller pieces. This makes it easier for it to pass through our digestive system and for the body to extract nutrients from it.

There are many examples. Some common ones include bike riding, running, walking fast or even dancing!

When we breathe, we take oxygen into our lungs. Red blood cells spread the oxygen from our lungs throughout our entire body, where it is used in the production of energy. (That energy powers the body.)

There are 11 main systems in the human body, but you don't need to memorize them unless you are a doctor.

It would be hard for the body to perform its important functions. Since all systems are interconnected, if one does not work this affects how the others will function too.

When the heart rate increases more blood is pumped through circulatory system. This blood is sent to the muscular system to help your muscles work and keep the body moving.

The left side of the heart receives blood from the lungs, which contains oxygen. The right side of the heart has blood with less oxygen. This is because the oxygen has been used up to help power your other body systems.

They get shorter in size, which plays a role in helping a person move.

Nutrients from food digested in the stomach are absorbed as they pass through the small intestine. Then the large intestine helps absorb water and remove waste from the body. The small intestine is four times longer than the large intestine - Wow!

Food: The digestive system takes in food and breaks it down, then the circulatory system sends the nutrients to all parts of the body.

Water: The digestive system also takes in water which ends up in your blood. The circulatory system distributes it around your body.

Air: Taken in by your respiratory system. The oxygen in the air passes into your circulatory system.

Shelter: Found or built using your nervous system, muscular system, skeletal system and more.

Sleep: While you sleep, all your systems are still working, though some work more than others during this time.