1. (c) McGraw Hill Ryerson 2007 2.1 Body Systems A system is made of parts that work together as a whole. The Characteristics of Systems  1. A system is made of individual parts that work together as a whole.  2. A system is usually connected to one or more systems.  3. If one part of a system is missing or damaged, the system will not function well or may not function at all. See pages 54 - 55 A stereo system has many parts that work together.

3. (c) McGraw Hill Ryerson 2007 Systems of the Human Body Eleven systems of the human body See pages 56 - 57 Circulatory System Transports blood, nutrients, gases, and wastes Digestive System Breaks down food and absorbs the nutrients Respiratory System Exchanges gases in lungs and tissues Excretory System Removes liquid and gas wastes from the body Immune System Defends body against infections Endocrine System Manufactures and releases hormones

4. (c) McGraw Hill Ryerson 2007 Systems of the Human Body More Systems… See pages 56 - 57 Reproductive System Includes reproductive organs for producing offspring Integumentary System Creates a waterproof barrier around the body Skeletal System Supports, protects, and works with muscles to move parts of the body Muscular System Has muscles that work with the bones to move parts of the body Nervous System Detects changes in the environment and signals the body to carry out a response

16. (c) McGraw Hill Ryerson 2007 Organ Systems An organ system has one or more organs that perform specific body functions.  For example your heart is part of the circulatory system. The four levels of organization within the human body are: cell tissue organ organ system See page 58

17. Organ Systems (c) McGraw Hill Ryerson 2007

18. Tissues: The Foundation of Body Systems See pages 58 -59 Tissue is a group of cells that have the same structure and function. Four types of body tissue:  Muscle tissue  Assists in body movement  Nerve tissue  Transfers signals to and from brain  Connective tissue  Holds together and supports other tissue  Epithelial tissue  Covers the surface of organs and body

19. Take the Section 2.1 Quiz