Do now: What is this?

Organization of Multicellular Organisms How do different structures carry out the functions of life?

Specialized Cells The cell is the smallest unit of life Different cells are specialized to carry out specific functions Ex: Nerve Cells are long with many projections that connect to other nerve cells and transmit signals around the body

Tissues Groups of similar types of cells that work together to carry out specific tasks in multicellular organisms Ex: Nervous tissue – carries messages to and from the brain

Organs Different groups of tissues working together to perform a particular job Can be made up of several different tissue types Ex: The Brain – made of nerve tissue, connective tissue, epithelial tissue, etc. Function: Control center for all the body’s functions, such as walking, talking, heart rate, etc.

Organ Systems Groups of organs that work together to complete a series of tasks Ex: Nervous System – brain, spinal cord, Monitors changes inside and outside the body Processes and interprets sensory input Supplies response by activating muscles or glands

Other Organ Systems Digestive: breaks down food and absorbs nutrients Excretory: removes solid, liquid and gas waste from the body Respiratory: exchanges gases between the body and the environment Circulatory: transports nutrients, gases, wastes and other substances through the body Muscular: allows movement Skeletal: protects internal organs, provides support, helps the body move and stores minerals

Homework Be sure to include the definition and a picture/example Choose a Graphic Organizer to illustrate the 5 Levels of Organization (cell, tissue, organ, organ system, organism). Be sure to include the definition and a picture/example