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Human Body Systems 7th grade 2014 Circulatory System • Working with the respiratory system, it carries needed materials to cells and carries away form cells, • Removes wastes from the body Digestive System • break down food into molecules the body can use; • allow materials to be absorbed into bloodstream; • Eliminate wastes Endocrine System • controls many of the body's daily activities as • well as long-term changes such as development Excretory System • Waste chemicals, salts, and excess water are removed from the body; • excess salts and water removed in sweat; • waste gases are eliminated in exhaled breath from lungs Immune System • distinguish between different kinds of pathogens (disease/germ) with a defense • targeted specifically at that pathogen Integumentary System • protects body from injury; helps regulate temperature; • Eliminate waste; • gather information about the environment; • produce vitamin D Muscular System • provides force to move bones; • automatically control movements inside the body, ex: heart beats Nervous System • receives and relays information for your body to maintain homeostasis, • stable internal environment Respiratory System • moves oxygen from outside environment into the body; • removes carbon dioxide and water from the body Skeletal System • • • • • protects the organs, Provides shape & support, allows for movement, produces blood cells, stores some materials for use later