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Ch. 5 - Skin
Q & A - Skin Layers
Question | Answer |
---|---|
What are 2 major divisions of the skin? | Epidermis and Dermis. |
What is the role of the Hypodermis? | This layer attaches skin to the body ; fat storage ; fights pathogens ; insulation ; brings blood supply ; pressure detection. |
Forms the Hypodermis Layer. | Adipose & Loose Connective Tissue |
Forms the Epidermis. | Stratified squamous epitheliam. |
The Epidermis does not have a blood supply (True/False). | True |
Stratum Basale | Deepest layer, reproductive layer ; reproduces new keratinocytes. |
Stratum Corneum | Boundry ; keeps things out ; keeps things in. |
Keratinocytes | This cell represents 90% of the skin. |
What are warts? | (Virus) An epidermal tumor. |
What is dandruff? | Over production of new cells in the epidermis. |
What are calluses? | Thickened area of skin due to constant pressure. |
What are blisters? | Physical separation of Epidermis and Dermis - fluid fills in the space. |
The Epidermis provides these types of protection: | Abrasion, Pathogens, Ultraviolet radiation, Chemicals, and Repair. |
What does it mean to have strength (Dermis)? | Lots of Collagen. |
What does it meas to have extensibility (Dermis)? | Elastic - stretch without damaging yourself. |
What does it mean to have elasticity (Dermis)? | Stretch - recoils back to normal. |
What are the functions of the Dermal Papillae? | Blood supply for the Epidermis ; Sensations ; Fingerprints. |