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ANATOMY & PHYSIOLOGY 1 - Coggle Diagram
ANATOMY & PHYSIOLOGY 1
SKIN
DERMIS (FIBROUS CONNECTIVE TISSUE
endowed with blood cells & nerve endings
sweat glands and hair follicles (hypodermis and here)
Papillary layer - superficial 1/5
HYPODERMIS/SUBCUTANEOUS FAT
EPIDERMIS (STRATIFIED SQUMAOUS EPITHELIUM) - C/L/G/S/B
STRATUM GRANULOSUM
2-5 layer flat Keratinocytes
dark staining Keratohyalin Granules (Keratinocytes) - scanty THIN skin
STRATUM SPINOSUM
many layers of Keratinocytes - shrunken by fixed tissue - attached to Democytes (spiny-look) - flattened by Dermis
protect against Pathogens
Dendritic cells - not visible in stained preparations
STARTUM LUCIDUM
translucent zone (clear)
Keratinocyte densely packed (narrow)
seen in ONLY thick skin
STRATUM CORNEUM (KERATIN)
30 Layer of dead, scaly Keratinized cells
surface flake of Dander, stuck together by oil from scalp (dandruff)
Prevent loss @ entry of water
if not damaged, prevent entry of pathogen & some cehmicals
DEFINITION
CONTENTS
STRATUM BASALE
single layer cuboidal to columnar on basement membrane
site of mitosis
consist Keratinocytes, Melanocytes, Tactile (Merkel) cells
melanin in keratinocytes in layer black to brown skin