1. Classwork Why can’t you use your teeth to breathe?
Why can’t you use your arm muscles to digest food?
Vocabulary: Find the next blank page in your Vocabulary composition notebook. Title the page, “Body Systems” Define the following terms on that page:
You may use Chapter 2, section 3 (pg. 64), or the glossary to define the words.
cell
function
tissue
Epithelial tissue
organ
Nervous tissue
Organ system
Muscle tissue
Organism
Connective tissue
Structure

2. The Benefits of Being Multicellular
You are a ____________ __________. That means you are made of many cells.
Benefits of being multicellular:
Larger size
Longer life
Specialization (more efficient)
multicellular
organism

3. Review…
What are cells?
Cells are the smallest unit that can perform all of the processes of life.

4. Cells Working Together
A ________ is a group of cells that work together to perform a specific job.
Animals have four basic types of tissues:
Nerve tissues
Muscle tissues
Connective tissues
Protective tissues
Plants have three types of tissues:
Transport tissues
Ground tissues
tissue

5. Tissues Working Together
A structure that is made up of _____ or more _________ working together to perform a specific function is called an _________.
Animal organs:
Heart, stomach, brain, lungs, intestines
Plant organs:
Roots, stems, leaves
two
tissues
organ

6. Organs Working Together
A group of ________ working together to perform a particular function is called an _________ _________.
Examples: digestive system, respiratory system, circulatory system
Plants also have organ systems
Examples: leaf system, root system, stem systems
organs
organ
system

7. Organisms/Structure & Function
Anything that can perform life processes by itself is an _________.
__________ is the arrangement of parts in an organism. It includes the shape of a part and the material of which the part is made.
__________ is the job a part does.
organism
Structure
Function

8. Levels of Organization
Cells
Tissues
Organs
Organ
Systems
Organism