Skin Flashcards
What are 5 functions of the skin?
Protection Thermoregulation Water regulation Sensation Absorption Storage and synthesis
What layer is present in thick skin and NOT in thin skin?
Stratum lucidum
What is not found in the epidermis?
Blood vessels
What cells in the epidermis are sensory receptors?
Merkel cells
What do melanocytes in the epidermis produce?
Melanin
What are the 5 layers of the epidermis? (thick skin)
Stratum corneum Stratum lucidum Stratum granulosum Stratum spinosum Stratum basale
Which cells make up 95% of epidermal cells?
Keratinocytes
What is the strong, connective tissue layer rich in collagen and elastic fibres?
The dermis
What is the dermis?
What is it rich in?
A strong, connective tissue layer.
Rich in collagen and elastic fibres.
What does the dermis contain?
Blood vessels Lymphatics Fibroblasts Nerves Glands Hair follicles Macrophages Smooth muscle
What are the 2 layers of the dermis?
Papillary and reticular layer
What layer of the dermis is rich in capillaries and nerve endings?
Papillary layer
What layer of the dermis is dense connective tissue containing fibres?
Reticular layer
What disease is the loss of skin pigment?
Vitiligo
What causes squamous cell carcinoma?
Keratinocytes in the epidermis grow out of control and form a tumour
What kind of connective tissue is the lamina propria?
Loose fibrous connective tissue (areolar)
What is the lamina propria and where is it?
A supportive areolar layer.
Beneath the mucosal epithelium and its basement membrane.
What are the 2 components of the lamina propria?
Cells and extracellular matrix
What cell types are present in the lamina propria?
Fibroblasts and immune cells
What are the 2 components of the mucosa?
Epithelium and lamina propria
What epithelium is present in the trachea?
Ciliated pseuodstratified epithelium
What is rich in the lamina propria of the trachea?
Elastin fibres
What epithelium are present in the oral mucosa?
Stratified squamous epithelium
What are rete ridges?
Epithelial extensions that project into the underlying connective tissue in skin and mucous membranes
What are the epithelial extensions that project into the underlying connective tissue in skin and mucous membranes?
Rete ridges
