general organization skin dr. mah jabeen muneera assistant professor department of anatomy kemu...
TRANSCRIPT
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GENERAL ORGANIZATION SKIN
Dr. Mah Jabeen MuneeraAssistant Professor
Department of AnatomyKEMU
TERMS, PLANES, POSITIONS
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ANATOMICAL POSITION
SIGNIFICANCE
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PLANES
MEDIANSAGITTALCORONAL/ FRONTALHORIZONTALOBLIQUE
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TERMS
ANTERIORPOSTERIORVENTRALDORSAL
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MEDIALLATERALSUPERIOR INFERIORCRANIAL CAUDAL
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PROXIMALDISTALEXTERNAL INTERNALSUPERFISCIALDEEPCOMBINED TERMS IPSILATERALCONTRALATERAL
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FOR LIMBS
RADIALULNARTIBIALFIBULARPALMARPLANTAR
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GENEARL ORGANIZATION
CELL- basic unit of structure and function
TISSUE
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BASIC TISSUES
Similar structural & functional characteristics– Epithelium– Connective Tissue– Nervous Tissue – Muscular Tissue
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ORGAN
SYSTEM
ORGANISM
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INTEGUMENTARY SYSTEM
Skin & derivativesHairNailMuco-cutaneous junctionsAssociated glands
– Sweat glands– Sebaceous glands– Mammary glands
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Skin covers body surfaceext. auditary meatusLat. Surface of ear drumvestibule of nose
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8% of total body massSurface area 2.2m2
Thickness varies, depending upon age and region
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STRUCTURE
EpidermisDermis
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LAYERS
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FUNCTIONS Self renewing interface Sensation Protection Temperature Regulation Control of water output Absorption Secretion Excretion Synthesis of vitamin D Storage pH regulation Repair after trauma Elasticity; skin lines Social Communication Dermatoglyphics
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APPEARANCE
Skin linesComplexion
– Thickness– Reddish hue of vascularity– Melanin– Carotene
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Distribution of hairSkin glandsChanges due to maturation, ageingGeneral state of health
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SKIN LINES
TENSION LINES (LANGER’s) Incision linesSTRETCH MARKSWRINKLESDERMATOGLYPHICSOCCUPATIONALFLEXURE LINES; JOINT LINES
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SUPERFICIAL FASCIA
Loose connective tissueAdipose tissueDistribution variesContours insulation
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DEEP FASCIA
Thick connective tissueBinds superfiscial fascia with underlying
tissues Invests structures; muscles, nerves, blood
vesselsSends partitions
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CLINICAL SIGNIFICANCE
Information tells clinician about HOW & WHERE the fluids e.g. pus will track
Lymphatics follow the plane of fascia, knowledge is important in malignancies