The three major regions of the skin are the __________, ___________, and ___________.
Epidermis, dermis, and hypodermis
What is the superficial region of the skin?
What is the middle region of the skin?
The deepest layer is the ____________.
The hypodermis is also know as the _____________ layer.
What layer is not technically part of the skin?
The hypodermis is mostly ___________.
The epidermis is ____________.
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?
10-25% of melanocytes is located in the _________ _________.
Epidermal dendritic cells are also known as ___________ cells.
Epidermal dendritic cells are macrophages that help activate the __________ ___________.
Tactile cells are also known as __________ cells.
What are tactile cells?
Name the layers of the sking in order from the top to bottom:
stratum corneum, stratum granulosum, stratum spinosum, and stratum basale.
Several layers of keratinocytes unified by desmosomes. Cells contain thick bundles of intermediate filaments made of pre-keratin.
Most superficial layer; 25-30 layers of dead cells represented only by flat membranous sacs filled with keratin. Glycolipids in extracellular space.
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.
Three to five layers of flattened cells. organelles deteriorating; cytoplasm full of lamellated granules (release lipids) and keratohyaline granules.
Stratum Basale is the deepest epidermal layer firmly attached to the __________.
The basale layer is a single row of _______ _______.
The stratum basale is also known as what?
What happens in the stratum germinativium?
cells undergo rapid division
Journey from basal layer to surface takes how long?