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Related Flashcards
Cards In This Set
| Front | Back |
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Identify the three layers of skin.
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Epidermis, Dermis and Hypodermis
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Name the layers of the Epidermis.
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Stratum Corneum
Stratum lucidium (only in thick skin) Stratum granulosum Stratum spinosum Stratum Basale |
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Describe the Stratum Corneum and where it is in the Epidermis.
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The most superficial layer in the Epidermis.
Layer of dead cells filled with Keratin. |
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Describe the Stratum Granulosum and where it is in the Epidermis.
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Below the Stratum Corneum and above the Stratum Spinosum in thin skin.
Below the Stratum Lucidum and above the Stratum Spinosum in thick skin. Flat, deteriorating cells releasing lipids and keratin granules. |
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Describe the Stratum Lucidium and where it is in the Epidermis.
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Below the Stratum Corneum and above the Stratum Granulosum.
Only in thick skin like the palms and soles. Clear, densely packed keratinocytes, Cells have no nuclei or organelles. |
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Describe the Stratum Spinosum and where it is in the Epidermis.
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Below the Stratum granulosum and above the Stratum Basale.
Keratinocytes joined by desmosomes. Lots of intermediate filament of pre-karatin. |
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Describe the Stratum Basale and where it is in the Epidermis.
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Deepest layer of the Epidermis resting below the Stratum Spinosum.
One row of actively mitotic cells, some of which move up to the Stratum Spinosum. Occasional Melanocytes. |
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What type of tissue is in the Epidermis?
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Keratinized stratified squamous epithelium
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What are the cell types present in the Epidermis?
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Keratinocytes
Melanocytes Dendritic Cells (Langerhans Cell) Merkel Cells (Tactile Cells) |
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What is the role of Keratinocytes?
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Synthesizing Keratin
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What is/are the role(s) of Melanocytes?
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Synthesize the brown to black pigment in Melanin
The pigment produced shields the DNA from UV radiation |
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What is/are the role(s) of Dendritic Cells (A.K.A. Langerhans Cells)?
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Help with the immune system
They are macrophages that get rid of foreign material in the body. |
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What layers of the epidermis are Dendritic (Langerhans) Cells found?
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Stratum spinosum
Stratum granulosum |
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Where are Dendritic (Langerhans) Cells found?
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Oral cavity
Esophagus Vagina |
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What are Merkel (Tactile) Cells for?
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Receptors for touch
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