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

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

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

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

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

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

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

Levels of Organization Cells Tissues Organs Organ Systems Organism