Buffl

Histo (topic2) Skin

ds
von dawn S.

????

o also known as the ___________ layer

o ______ cell layers

o ______

o it is the uppermost/ superficial layer of the epidermis

o Consists of flattened, dead cells filled with soft keratin filaments

o This is the layer which varies most in thickness, especially in callused skin.

o within this layer, the dead keratinocytes secrete ________ which are part of our first immune defense.

o continuous shedding (________)

o Cornified layer with cornified cells called ________

o Most differentiated cells in the skin it also responsible for the formation of calluses which is a reactive process

o Thick plasma membrane of the keratinized cells is coated from the outside in the deeper portion of this layer with extracellular layer of lipids that form the major constituent of the _____ barrier in the epidermis

o Layer that varies most in thickness

o Thickness of this layer constitutes the principal difference between epidermis of a thick and thin skin; thick and thin skin differs on the thickness of the skin

o Cornified layer may become even thicker at the site that are subjected to unusual amounts of friction as in the formation of calluses on the palms of the hands and on the fingertips.

o Callus formation is a reactive process

STRATUM CORNEUM

o also known as the cornified layer

o 20-30 cell layers

o anucleate

o it is the uppermost/ superficial layer of the epidermis

o Consists of flattened, dead cells filled with soft keratin filaments

o This is the layer which varies most in thickness, especially in callused skin.

o within this layer, the dead keratinocytes secrete defensins which are part of our first immune defense.

o continuous shedding (desquamation)

o Cornified layer with cornified cells called squames

o Most differentiated cells in the skin it also responsible for the formation of calluses which is a reactive process

o Thick plasma membrane of the keratinized cells is coated from the outside in the deeper portion of this layer with extracellular layer of lipids that form the major constituent of the water barrier in the epidermis

o Layer that varies most in thickness

o Thickness of this layer constitutes the principal difference between epidermis of a thick and thin skin; thick and thin skin differs on the thickness of the skin

o Cornified layer may become even thicker at the site that are subjected to unusual amounts of friction as in the formation of calluses on the palms of the hands and on the fingertips.

o Callus formation is a reactive process


• Beneath the dermis is the ___ or ____ or __

o Layer rich of adipose tissues

o Deepest layer, derived from _______

o Lobules of adipocytes separated by _____

▪ Consists of adipose tissue, blood vessels & nerves

▪ Also contains sweat glands & bases of hair follicles

• Particularly thick in individuals who live in ______ climates

• This layer and its associated loose connective tissue constituting of hypodermis or subcutaneous facia, it is predominantly composed of adipose tissue in many areas it is separated by a _____________

• Repository of energy

• Endocrine organ

• _____ (body weight regulation)

• Conversion of _________ into ____ by ________

o This layer produces …… a hormone that regulates body weight via the ________.

SUBCUTIS/SUBCUTANEOUS/HYPODERMIS

• Beneath the dermis is the subcutis or hypodermis or panniculus

o Layer rich of adipose tissues

o Deepest layer, derived from mesenchyme

o Lobules of adipocytes separated by fibrous SEPTA

▪ Consists of adipose tissue, blood vessels & nerves

▪ Also contains sweat glands & bases of hair follicles

• Particularly thick in individuals who live in cold climates

• This layer and its associated loose connective tissue constituting of hypodermis or subcutaneous facia, it is predominantly composed of adipose tissue in many areas it is separated by a vertical fibrous septum

• Repository of energy

• Endocrine organ

• LEPTIN (body weight regulation)

• Conversion of androstenedione into estrone by aromatase

o This layer produces leptin a hormone that regulates body weight via the hypothalamus.

Author

dawn S.

Informationen

Zuletzt geändert