Structure of the skin Flashcards
(17 cards)
Outermost layer composed of stratified, squamous,
keratinized ( no nucleus) epithelial cells.
Epidermis
it is the process in which new cells pushes old cells through the surface resulting to change in cell shape and eventually causing this cells to die
keratinization
what are the five layers are of strata?
Stratum corneum
Stratum lucidum
Stratum granulosum
Stratum spinosum
Stratum basale/ germativum
formed the outer most layer of the epidermis.
It consists of dead cells (libag) converted to protein
they are called keratinized cells because they have lost most of their fluid
Stratum corneum
sole of the feet & palm
at least directly beneath the stratum corneum, but is difficult to see in thinner skin
It is only one or two cells layers thick. Cells are transparent and flat.
Stratum lucidum
to dehydrate the cell
- consist of two or three layers of flatten cells
- this layer is very active in keratinization.
- in this layer the cell lose their nuclei and become compact and brittle
Stratum granulosum
spikey appearance
- consist of several layers of prickly or spiny shape cells that are polyhedral in structure.
In this layer, desmosomes are still quite prevalent
Stratum spinosum
Deepest layer
- the deepest and most important layer of the skin because it contains the only cells of the epidermis that are capable of dividing by mitosis
Stratum basale or Stratum germinativum
The stratum germinativum also contains cells called melanocytes which are responsible for producing skin color (melanin producers)
stratum germinativum
know as the true skin and corium
Dermis
it is the area adjacent to the epidermis
papillary portion
it is found between the papillary portion and the fatty subcutaneous tissue beneath
Reticular portion
what component of the hypodermis makes it a good insulator and shock absorber
Fat cells
It is composed of dense connective tissue with tough white collagenous fibers and yellow elastin fibers.
Dermis
melanin producers
melanocytes
you can see blood vessel and glands in dermis
ito yung sa ilalim ng dermis na nakikita ang fat cells
hypodermis