-
The three major regions of the skin are the __________, ___________, and ___________.
Epidermis, dermis, and hypodermis
-
What is the superficial region of the skin?
Epidermis
-
What is the middle region of the skin?
dermis
-
The deepest layer is the ____________.
hypodermis
-
The hypodermis is also know as the _____________ layer.
subcutanious
-
What layer is not technically part of the skin?
hypodermis
-
The hypodermis is mostly ___________.
adipose
-
The epidermis is ____________.
vascular
-
What kind of tissue is the epidermis made of?
Stratified squamous epithelium
-
What are the 4 cells of the epidermis?
kearatinocytes, melanocytes, epidermal dendritic cells, and tactile cells
-
What does keratinocytes produce?
fibrous protein keratin
-
What does melanocytes produce?
pigment melanin
-
10-25% of melanocytes is located in the _________ _________.
lower epidermis
-
Epidermal dendritic cells are also known as ___________ cells.
Langerhans
-
Epidermal dendritic cells are macrophages that help activate the __________ ___________.
Immune System
-
Tactile cells are also known as __________ cells.
Merkel
-
What are tactile cells?
Touch Receptors
-
Name the layers of the sking in order from the top to bottom:
stratum corneum, stratum granulosum, stratum spinosum, and stratum basale.
-
What layer?
Several layers of keratinocytes unified by desmosomes. Cells contain thick bundles of intermediate filaments made of pre-keratin.
Stratum spinosum
-
What layer?
Most superficial layer; 25-30 layers of dead cells represented only by flat membranous sacs filled with keratin. Glycolipids in extracellular space.
Stratum corneum
-
What layer?
Deepest epidermal layer; one row of actively mitotic stem cells; some newly formed cells become part of the more superficial layers. See occasional melanocytes and epidermal dendritic cells.
Stratum basale
-
What layer?
Three to five layers of flattened cells. organelles deteriorating; cytoplasm full of lamellated granules (release lipids) and keratohyaline granules.
Stratum granulosum
-
Stratum Basale is the deepest epidermal layer firmly attached to the __________.
dermis
-
The basale layer is a single row of _______ _______.
Stem cells
-
The stratum basale is also known as what?
Stratum germinativium
-
What happens in the stratum germinativium?
cells undergo rapid division
-
Journey from basal layer to surface takes how long?
25-45 days
|
|
