Skin - Layers Of the Epidermis Flashcards
What is the mnemonic for remembering the layers of the skin?
Cover or Let's Get Sun Burned
5 Stratum Basale/stratum germinativum
- Stratum Spinosum
- Stratum Granulosum
- Stratum lucidum
- Stratum Corneum
What is the fifth layer of the epidermis?
Stratum basale/stratum germinativum
What is the fourth layer of the epidermis?
Stratum spinosum
What is the third layer of the epidermis?
Stratum granulosum
What is the second layer of the epidermis?
Stratum lucidum
What is the first layer of the epidermis?
Stratum Corneum
Write a note on the stratum basale/stratum germinativum
6
The deepest layer
Has stem cells that continually divide
Some cells move to the surface - squamous cells
Others give rise to sweat or oil glands
In hairless skin this layer contains tactile discs that are touch receptors (Merkel Discs)
Melanocytes may be found in this stratum also
Which is the deepest layer?
Stratum basale/stratum germinativum
What type of cells are found in the stratum basale that continuously divide?
Stem cells
What type of cells move to the surface in the stratum basale?
Squamous cells
What can be found in the stratum basale only in hairless skin?
Tactile discs that are touch receptors (Merkel Discs)
What is the name given to the touch receptors in the stratum basale?
Merkel Discs
List the types of cells present in the stratum basale.
4
Squamous cells
Stem cells
Epithelial cells which give rise to sweat/oil glands
Melanocytes
Write a note on the stratum spinosum.
Has 8-10 rows of polyhedral cells tightly packed
What type of cells are found in the stratum spinosum?
Polyhedral cells
How many rows of cells are found in the stratum spinosum?
8-10
Write a note on the stratum granulosum.
2
Has 3-5 rows of flattened cells with degenerating nuclei
These cells produce keratin
How many rows of cells are there in the stratum granulosum?
3-5 rows
What type of cells are found in the stratum granulosum
Flattened cells with degenerating nuclei that produce keratin
Write a note on the stratum lucidum
2
This is only found in thick skin of the palms and soles
They are flat densely packed cells
What type of cells are found in the stratum lucidum?
Flat densely packed cells
Write a note on the stratum corneum.
2
Has 15-30 rows of flat, dead cells completely filled with keratin
This layer is continually shed and replaced
How many rows are there in the stratum corneum?
15-30
What type of cells are present in the stratum corneum?
Flat, dead cells completely filled with keratin
What are the cells in the stratum corneum filled with?
Keratin
What continually happens to the stratum corneum?
It is continually shed and replaced
