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Organ Systems


Human Lungs and Rib

Human Lungs and Rib

Image: Renjith Krishnan / FreeDigitalPhotos.net
The human body is made up of several organ systems that work together as one unit. Ten major organ systems of the body are listed below, along with several organs that are associated with each system.

Organ Systems

  • Primary organs: mouth, stomach, intestines, rectum

  • Accessory organs: teeth, tongue, liver, pancreas
    4. Integumentary System: This system protects the internal structures of the body from damage, prevents dehydration, stores fat and produces vitamines and hormones.
    • Integumentary structures: skin, nails, hair, sweat glands
    7. Reproductive System: This system enables the production of offspring through sexual reproduction. It is comprised of male and female reproductive organs and structures which produce sex cells and ensure the growth and development of offspring.
    • Male organs: testes, scrotum, penis, vas deferens, prostate

    • Female organs: ovaries, uterus, vagina, mammary glands
    8. Respiratory System: This system provides the body with oxygen via gas exchange between air from the outside environment and gases in the blood.
    • Respiratory organs: lungs, nose, trachea, bronchi
    9. Skeletal System: This system supports and protects the body while giving it shape and form.
    • Structures: bones, joints, ligaments, tendons, cartilage

It is important to keep in mind that these organ systems don't just exist as individual units. The final product of these cooperating systems is one unit called the body. Each system depends on the others, either directly or indirectly, to keep the body functioning normally.

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