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Organ Systems An Overview Introduction Your body is made up of over 60 trillion cells! But, these cells normally don’t work alone. They team up into larger groups to make up part of a larger organisms… YOU! Cells, Tissues and Organs Two or more cells working together to perform a task form a tissue. e.g. epithelial, nerve, muscle, connective Two or more tissues working together to perform a task from an organ. e.g. heart, brain, lungs, stomach, skin Organ Systems Many organs work together as a team! Two or more different organs working to perform a task form an organ system. There are 10 organ systems in the body. Digestive System Main Function To break down food and absorb nutrients into the body. Main Organs mouth, esophagus, stomach, intestines Circulatory System Main Function To transport nutrients and other substances around the body. Main Organs heart, blood, blood vessels Respiratory System Main Function To take in oxygen and breath out carbon dioxide. Main Organs nose, mouth, trachea, lungs, diaphragm Nervous System Main Function To send messages around the body and to control bodily functions. Main Organs brain, spinal cord, nerves Skeletal System Main Function To provide shape, support and protection for the body. Main Organs All of the bones in the human body (206). Muscular System Main Function To provide movement, which includes moving things through the body. Main Organs Muscles, tendons, and ligaments Immune System Main Function To destroy and remove invading microbes from the body. Main Organs white blood cells, spleen, appendix, lymph nodes Excretory System Main Function To remove waste products from the body. Main Organs kidney, bladder, urethra Endocrine System Main Function To produce and release hormones in the body Main Organs thyroid, pancreas, pituitary & hypothalamus glands Reproductive System Main Function To produce reproductive cells in order to reproduce. Main Organs Male: testes, seminal vesicles, penis Female: ovaries, oviducts, uterus, vagina Any Questions?