The 12 Organ Systems I. Integumentary System A. Function: 1. External body covering 2. Protects tissues from injury 3. Synthesizes vitamin D B. Includes: 1. Cutaneous receptors (pain, temperature and pressure) 2. Hair, skin & nails Integumentary System II. Skeletal System A. Function: 1. Protects and supports body organs 2. Framework for muscles to work 3. Produces blood cells B. Includes: 1. Cartilage 2. Bones 3. Joints Skeletal System III. Muscular System A. Function: 1. Allows for movement 2. Internal movement 3. Facial expression B. Includes: 1. Skeletal muscles 2. Organ muscles Muscular System IV. Lymphatic System A. Function: 1. Houses white blood cells (immune) 2. Picks up leaks from blood vessels 3. Disposes of debris in lymph system B. Includes: 1. Lymph nodes 2. Lymphatic vessels 3. Thoracic duct Lymphatic System V. Immune System A. Function: 1. Attacks foreign substances with antibodies 2. Protects body B. Includes: 1. Red bone marrow 2. Spleen 3. Thymus 4. Lymphocytes Immune System VI. Respiratory System A. Function: 1. Keeps blood supplied with oxygen 2. Removes carbon dioxide (gas change) B. Includes: 1. Nasal cavity2. Pharynx 3. Larynx 4. Trachea 3. Larynx 4. Trachea 5. Bronchus 6. Lungs Respiratory System VII. Nervous System A. Function: 1. Respond to stimuli (internal/external) 2. Fast acting control system B. Includes: 1. Brain 2. Sensory receptors 3. Spinal cord 4. nerves Nervous System VIII. Endocrine System A. Function: 1. Secrete hormones 2. Regulate homeostasis B. Includes: 1. Pineal gland 5. Adrenal gland 2. Pituitary gland 6. Pancreas 3. Thyroid gland 7. Testis/ovary 4. Thymus gland Endocrine System IX. Cardiovascular System A. Function: 1. Pumps blood 2. Transport O 2 and CO 2 B. Includes: 1. Heart 2. Blood vessels Cardiovascular System X. Digestive System A. Function: 1. Breaks down food 2. Eliminates indigestible food (feces) B. Includes: 1. Oral cavity 5. Large intestine 2. Esophagus6. Rectum 3. Stomach7. Anus 4. Small intestine Digestive System XI. Urinary System A. Function: 1. Regulates water, electrolyte and blood balance of acid/base 2. Eliminates wastes B. Includes: 1. Kidney 2. Ureter 3. Urinary bladder 4. Urethra Urinary System XII. Reproductive System A. Function: 1. Production of offspring 2. Release sex hormones (estrogen/testosterone) B. Includes: 1. Lots of stuff we will get to later 2. Ovaries/testis Reproductive System Review ***See handout