Levels of Organization in the Human Body Directions: Take notes in your science notebook

Levels of Organization in the Human Body Directions: Take notes in your science notebook Be prepared to share out loud – Checking for your understanding questions.

Levels of Organization Chemical Atoms made up of subatomic particles Molecules 2 or more atoms Macromolecules small molecules joined together

Levels of Organization Cellular Macromolecules combine to form cells Basic structural and functional unit of the body 4

Levels of Organization Tissue Group of cells working together to perform a function 4 basic types Epithelial Connective tissue Muscle Nerve 5

Levels of Organization Organ 2 or more tissues joined together with a specific function and shape 6

Levels of Organization Organ Systems Related organs with a common function 12 body systems 7

Checking for Understanding #1 A is two or more atoms joined together.

Checking for Understanding #2 A is a group of cells working together to perform a function.

Checking for Understanding #3 The stomach, small intestine and large intestine work together to form an . 10