WARM UP Today we start our unit on living things List three objects in the classroom that you would consider to be “living” List three objects in the classroom that you would consider to be “non-living”

ESSENTIAL QUESTIONS What makes something living vs. non living? What is the relationship between cells, tissue, organs, & organ systems?

BRAINSTORMING Write two questions that you would like to be answered by the end of the Unit on the Cell

The Organization of Living Things

LIVING VS NON LIVING What makes an object be classified as living or non living? Lets brainstorm some ideas and write them on the board.

SWITCH POWERPOINTS

Benefits of Being Multicellular Larger Size: larger organisms are prey for fewer predators. Also, large predators can eat a wider variety of prey Longer Life: not limited to the life span of any single cell Specialization: each type of cell has a particular job. This makes the organism more efficient!

Example: Cardiac Muscle Cell

4 LEVELS OF ORGANIZATION 1. Cell 2. Tissue 3. Organ 4.Organ System

Level 1: Cell -Building blocks of life. Smallest unit that can perform life processes independently -Example: plant cell (square) and animal cell (round)

LEVEL 2: TISSUE CELLS WORKING TOGETHER Tissue: a group of cells that work together to perform a specific job Example: nerve tissue

2. muscle tissue 3. connective tissue

Example: Adipose (fat) cells in the skin 4. Protective Tissue Example: Adipose (fat) cells in the skin

LEVEL 3: ORGAN TISSUES WORKING TOGETHER Organ = a collection of tissues that carry out a specialized function of the body Example: heart - has mostly cardiac tissue, but also has nerve tissue and tissues of the blood vessels that all work together Other examples: stomach, intestines, brain, and lungs

Examples in plants: the leaf plant organ that contains tissue that traps light energy to make food Also: stems and roots

Is That a Fact?! In your lifetime, your body will shed about 40 pounds of dead skin!

LEVEL 4: ORGAN SYSTEM ORGANS WORKING TOGETHER Organ system = group of organs that work together to perform body functions Examples: digestive system, which includes several organs, such as the stomach and intestines

On its own: Organism Organism = a living thing; anything that can carry out life processes independently An organism can be unicellular, like this bacteria:

OR an organism can be multicellular, like you!

Structure & Function In organisms, structure and function are related. Structure = arrangement of parts in an organism -Includes the shape of a part and the material of which the part is made Function = the job that the part does

Example of Structure and Function: The structure of the lungs is a large, spongy sac. Blood vessels wrap around aveoli (air sacs). The structure of the aveoli and blood vessels enable them to perform a function, which is bring oxygen into the body and take out carbon dioxide.

Review: 1. A ____________ is the most basic unit of all living things. 2. The job that an organ does is the _________ of that organ. 3. A group of cells working together to perform a specific function is a ______.

Answers: 1. cell 2. function 3. tissue

EXIT SLIP If you were to compare the four levels to a scho