Integumentary System - Forms the external body covering, Skeletal System - Composed of bone, cartilage, and ligaments, Muscular System - Composed of muscles and tendons, Nervous System - Composed of the brain, spinal column, and nerves, Endocrine System - Release hormones into the bloodstream, Cardiovascular System - Composed of the heart and blood vessels, Lymphatic System - Composed of red bone marrow, thymus, spleen, lymph nodes, and lymphatic vessels, Digestive System - Breaks down food into absorbable units that enter the blood, Respiratory System - Keeps blood supplied with oxygen and removes carbon dioxide, Reproductive System - Main function is the production of offspring, Urinary System - Regulates water, electrolyte, and pH balance of the blood,

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