Identifying el Integumentary System

By: Marissa Kreidler and Martha Van Slyke

Informational Facts

The integumentary system includes the skin, hair, and nails.

The skin acts as a barrier that protects the body from infection.

Hair, such as eyelashes and ear hairs, keep many particles in the air from entering your body.

Major Organs of the Integumentary System






The only way that pathogens can get in is if the skin is cut and the body responds quickly to keep out as many pathogens as possible.

Levels of Organization for the Integumentary System

  • Molecular level – keratin, melanin and vitamin D
  • Microscopic level – stem cells and skin cells
  • Tissue level – epithelial and connective tissue
  • Organ level – skin, consisting of the epidermis, dermis, and hypodermis, as well as hair, nails and glands

We're covering the Integumentary System

Organ Level

The skin, the integumentary system’s organ, is composed of the epidermis (epithelial tissue) and dermis (connective tissues), with an underlying hypodermis that is technically not part of the skin organ. The organ is created by two main parts. The epedermis and the dermis. The epidermis is the upper or outer layer of the skin. However, the dermis is the inner layer of the skin. So, the organ level is basically just the skin.
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Homeostasis and the Integumentary System

When you are hot, you start sweating. Sweat beads are waste from your skin, the integumentary system. So when you are too warm, your integumentary system and homeostasis work together to balance out your body temperatures and make them more even. Skin cancer is one form of a disease or illness that can occur if homeostasis is not maintained in the integumentary system.


The skin is one of the first defense mechanisms in your immune system. The immune system is the main organs in your body. The integumentary system protects the organs in the immune system and in return the immune system functions the body. The digestive system also works with the integumentary system. Vitamin D activated by the skin stimulates dietary calcium absorption. The nervous system, including the brain spinal cord must be shared with the integumentary system, because if they are not covered, the body can't work properly.