In your body there are different levels of organisation. Cells come in may types, such as skin cells and muscle cells. Cells of the same job in the body are grouped together to form tissues, such as muscles and nerves. At the next level of organisation, tissues are grouped to form organs, such as the stomach or brain. An organ is a structure that contains at least two different types of tissue that work together to complete a task. Organs are arranged into organ systems that have 2 or more different organs that work together.

digestive system makes food available in a form the body can use

the respiratory system takes in oxygen
circulatory system carries food and oxygen to where it is needed
excretory system gets rid of the wastes

skeletal system supports the body and enables it to move

	Created by ILHAM HASSAN about 8 years ago

10 SLIDES BASED ON CHAPTER 1.2