Organ Systems
An Overview

Introduction
Your body is made up of over 60 trillion cells!
But, these cells normally don’t work alone.
They team up into larger groups to make up part of a larger organisms… YOU!

Cells, Tissues and Organs
Two or more cells working together to perform a task form a tissue .
e.g. epithelial, nerve, muscle, connective
Two or more tissues working together to perform a task from an organ .
e.g. heart, brain, lungs, stomach, skin

Organ Systems
Many organs work together as a team!
Two or more different organs working to perform a task form an organ system .
There are 10 organ systems in the body.

Digestive System
Main Function
To break down food and absorb nutrients into the body.
Main Organs mouth, esophagus, stomach, intestines

Circulatory System
Main Function
To transport nutrients and other substances around the body.
Main Organs heart, blood, blood vessels

Respiratory System
Main Function
To take in oxygen and breath out carbon dioxide.
Main Organs nose, mouth, trachea, lungs, diaphragm

Nervous System
Main Function
To send messages around the body and to control bodily functions.
Main Organs brain, spinal cord, nerves

Skeletal System
Main Function
To provide shape, support and protection for the body.
Main Organs
All of the bones in the human body (206).

Muscular System
Main Function
To provide movement, which includes moving things through the body.
Main Organs
Muscles, tendons, and ligaments

Immune System
Main Function
To destroy and remove invading microbes from the body.
Main Organs white blood cells, spleen, appendix, lymph nodes

Excretory System
Main Function
To remove waste products from the body.
Main Organs kidney, bladder, urethra

Endocrine System
Main Function
To produce and release hormones in the body
Main Organs thyroid, pancreas, pituitary
& hypothalamus glands

Reproductive System
Main Function
To produce reproductive cells in order to reproduce.
Main Organs
Male: testes, seminal vesicles, penis
Female: ovaries, oviducts, uterus, vagina

Any Questions?