Body Systems, Functions, and Organs

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Body Systems, Functions, and Organs

The body systems, their primary functions, and some representative organs included in each system are listed below:

Body System Primary FunctionOrgans Included
  • Lungs
  • Trachea
Cardiovascular/Circulatory Blood circulation
  • Heart
  • Arteries
  • Veins
  • Blood
DigestiveProcessing food
  • Mouth
  • Pharynx
  • Esophagus
  • Stomach
  • Intestines
  • Accessory organs: liver, gallbladder, abdomen, appendix
EndocrineHormone production
A number of glands throughout the body, including but not limited to:
  • Thyroid
  • Pituitary
  • Adrenal glands
UrinaryWaste elimination
  • Kidneys
  • Bladder
Reproductive Reproduction
  • Uterus
  • Ovaries
  • Fallopian tubes
Nervous/SensoryCommunication between and coordination of all the body systems
  • Brain
  • Nerves
  • Eyes
  • Ears
    IntegumentaryProtects against damage
    • Skin
    • Hair
    • Nails
      Muscular/SkeletalProvides form, support, stability, and movement to the body
      • Muscles
      • Bones
      Hematopoietic/LymphaticBlood production, maintenance of fluid balance, and defense against disease
      • Bone marrow
      • Spleen
      • Tonsils
      • Lymph fluid, nodes, ducts, vessels