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Human Body Systems Body System nervous system digestive system circulatory system respiratory system excretory system integumentary system skeletal system muscular system endocrine system reproductive system Functions Detects information from the environment. Controls body functions. Responds to the environment. Helps maintain homeostasis. Breaks down food and absorbs nutrients. Provides your body with materials for: growing, repairing tissues, and energy for everything you do Carries needed substances to cells Carries waste products away from cells Contains cells that fight disease. Takes in oxygen Removes carbon dioxide and water from the body Collects wastes produced by cells Removes wastes from the body Protects the body's internal living tissues and organs against: invasion by infectious organisms dehydration abrupt changes in temperature Disposes of waste materials Contains receptors for touch, pressure, pain, heat, and cold. Stores water and fat. Provides shape and support Allows you to move Protects your organs Produces blood cells Stores minerals and other materials until your body needs them Enables movement of the body and internal organs Helps the body maintain posture Activity generates heat as a by-product to aid in maintaining normal body temperature. Produces chemicals(hormones) that control many of the body's daily activities Regulates long-term changes such as growth and development Ensures survival of the species by producing offspring. page 2A Major Organs brain, spinal cord, nerves mouth, salivary glands, teeth, esophagus, stomach, small intestine, large intestine, liver, gallbladder, pancreas blood, heart, arteries, veins, capillaries nostrils, pharynx, trachea, bronchi, bronchial tubes, lungs, diaphragm kidneys, ureter, urinary bladder, urethra skin (including glands and nerves in the skin), hair, nails bones (femur, radius, ulna, vertebrae, ribs, cranium, phalanges, etc.) muscles: *voluntary (conscious control)- skeletal *involuntary (not consciously controlled) – cardiac and smooth thyroid gland, pituitary gland, ovaries, testes, adrenal glands, hypothalamus, parathyroid glands, pancreas female: ovaries, fallopian tubes, uterus, vagina male: testes, scrotum, penis