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Overview of the Integumentary System:
Overview of the Integumentary System:
LARGEST organ of the body!
Physical barrier between the external environment and the internal environment. The body's outer layer!
1st line of defense!
The average person has about 300 million skin cells!
Main function is protection, regulation, and sensation.
Epidermis:
Epidermis:
You can remember the layers of the epidermis by remembering the acronym Professor Clegg shared,
"Come Let's Get Sun-Burned"
Stratum Corneum
Stratum Lucidum
Stratum Granulosum
Stratum Spinosum
Stratum Basale
Image Credit: Anatomy & Physiology, An Integrated Approach, Page 168.
Image Credit: Anatomy & Physiology, An Integrated Approach, Page 191
Dermis:
Dermis:
The layer below the epidermis is the dermis. The dermis contains two layers:
Papillary Layer
Reticular Layer
You can remember that the papillary layer is above the reticular layer by remembering that P comes before R in the alphabet.
Hypodermis:
The hypodermis is the bottommost layer of the skin
It is also called the subcutaneous tissue.
The hypodermis contains many things such as connective tissue, adipose tissue, hair follicles, nerves, sweat glands, and blood vessels.
Fun Fact!
Fun Fact!
Dust mites/Dermatophagoides are organisms that feed on skin cells, usually keratin.
Dust mites/Dermatophagoides are organisms that feed on skin cells, usually keratin.
BioExplorer. (2019, April 27). Top 25 integumentary system facts: Skin fun facts: Biology explorer. Bio Explorer. Retrieved November 30, 2022, from https://www.bioexplorer.net/integumentary-system-facts.html/
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