Term
| Skin is the largest organ in body |
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Definition
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Definition
-Protection
-Thermoregulation
-Excretion
-Sensory reception
-Synthesis of Vitamen D |
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Epidermis
Dermis
Hypodermis |
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Term
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Definition
| Top Layer: Statified squamous keratinized epithelium |
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Definition
| principal cells of Epidermis: deepest layer or epidermis. Lifespan=15-30days |
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Definition
| produced by Keratinocytes: Protein which protects skin. amt. increases as it moves upward |
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Definition
| Dosnt contain blood vessels: Epidermis |
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| Cell type in Epidermis, Derived from NEURAL CREST: synthesize pigment melanin that absorbs UV, thus protecting the dividing cells of skin from damage |
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Definition
| produced by Melanocytes from TYROSINE with participation of enzyme TYROSINASE |
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| yellow coloring of skin and in the adipose cells |
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| Cell type of Epidermis: Derived from BONE MARROW; immune responses as antigen-presenting cells |
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Definition
| Type of cell in Epidermis: Fuction as Mechanoreceptors |
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Definition
| Composed DENSE CT rich in COLLAGEN TYPE 1 and ELASTIC FIBERS |
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Definition
| Principal cell type in Dermis |
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Definition
naked and free encapsulated nerve endings
provide mechanical strength and elasticity of skin
primary source of nutrition to the epidermis through blood vessels |
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Definition
| Dermal layer: LOOSE CT forms contour of DERMAL RIDGES that interdigitate w/ corresponding EPIDERMAL RIDGES of the deepest layer of Epidermis |
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Definition
| DENSE CT: countinuous with HYPODERMIS |
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| Difference in thickening of dermis |
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Definition
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Definition
LOOSE CT:(usually adipose)
"superficial Fascia"
Loosely binds the skin to the subjacent organs
NOT CONSIDERED PART OF THE SKIN |
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Definition
SEBUM-oily substance acts as lubricant for skin, protects from drying.
HOLOCRINE GLANDS
associated with hair follicles |
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Definition
| found in most places on body more abundant on palms and soles |
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Definition
| SHAFT:ROOT strongly influenced by sex hormones, adrenal and thyroid glands |
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Definition
Hemostasis
Inflammation
Proliferation
Remodeling |
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Definition
Vasoconstriction
Clot formation |
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Definition
| influx of neutrophilis and macrophages that remove dead tissue and bacterial by phagocytosis |
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Definition
Proliferation of fibroblasts in wound bed
Proliferation and new tissue deposition
New blood vessels are formed (angiogenesis)
proliferation of keratinocytes in deep layer of epidermis |
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Definition
| New collagen matrix becomes cross-linked and organized |
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Term
| Age-Related changes in skin |
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Definition
thining
num. of melanocytes decreases
num. sweat glands and sebacous glands decrease
- lack of sweating (cant control body temp), skin dries up
looses elasticity
adipose tissue in hypodermis thins
INCREASE BRUISING AND SKIN TEARS |
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