Integumentary System
Major Functions
- Protection from injury and infection.
- Protection from ultraviolet rays.
- Regulate body temperature.
- Removes waste products.
- Collects sensory information.
Layers of The Epidermis
Stratum Basale
-Deepest layer -New cells get pushed to the surface where there's less blood supply and begin to die. |
Stratum Granulosum
- 3-5 rows of flat cells. -Cytoplasm of cells contain granules -transform into waterproofing protein, Keratin. |
Stratum Lucidum
- 3-5 rows of flat dead cells. -Located on palms and soles. -Process of keratin formation continues. |
Stratum Spinosum
-Protects against foreign material. -Produce and retain lipids that prevent moisture loss from the skin. |
Stratum Corneum
- Most superficial - 20-50 rows of dead cells. -Cells are sloughed of by normal use. |
Epidermis
-Outer layer.
-Constantly dividing cells.
-Top layer is dead cells.
-Layer below produces keratin and melanin.
Dermis
-Middle layer.
-Holds most glands and endings.
-Thermo receptors.
-Meissner Corpuscles.
-Nociceptors.
-Pancinian Corpuscles.
Hypodermis
-Bottom layer.
-Fat, blood vessels, and connective tissue.
-Controls temperature
-Attachment to bone and muscle.
-Outer layer.
-Constantly dividing cells.
-Top layer is dead cells.
-Layer below produces keratin and melanin.
Dermis
-Middle layer.
-Holds most glands and endings.
-Thermo receptors.
-Meissner Corpuscles.
-Nociceptors.
-Pancinian Corpuscles.
Hypodermis
-Bottom layer.
-Fat, blood vessels, and connective tissue.
-Controls temperature
-Attachment to bone and muscle.
How it works with other body systems
- Primary function is to protects all the other body systems.
- Works as an extension of the Nervous System.
- It works with the skeletal system by holding it together.