《组织学与胚胎学 Histology and Embryology》课程PPT教学课件讲稿（双语版）Skin

Skin

Skin

GeneralLoutline skin is the biggest organ of the human bod is composed of epidermis, dermis and some accessory organs the function of the skin Y barrier and protection sensory organ excrete v body temperature regulation v cholesterol metabolism v absorbing some materials

General outline ▪ skin is the biggest organ of the human body ▪ is composed of epidermis , dermis and some accessory organs ▪ the function of the skin: ✓ barrier and protection ✓ sensory organ ✓ excrete ✓ body temperature regulation ✓ cholesterol metabolism ✓ absorbing some materials

pieris keratinized stratified squamous epithelium contains 2 cell types: stratum basale stratum spinosum Keratinocyte stratum granulosum stratum lucidum stratum corneum melanocyte keratinocyte Langergans cell Merkel cell

Epidermis: ▪ keratinized stratified squamous epithelium contains 2 cell types: Keratinocyte stratum basale stratum spinosum stratum granulosum stratum lucidum stratum corneum unkeratinocyte melanocyte Langergans cell Merkel cell

Dermis located beneath the epidermis PApillary laver: a thin layer of lCT, contain capillary plexuses and Meissner's corpuscles ■ Reticular layer: under the papillary later; consists of irregular DCT; contain large blood vessels, accessory organs of skin, nerve, and Pacinian corpuscles

Dermis: ▪ located beneath the epidermis ▪ Reticular layer: ▪ Papillary layer: a thin layer of LCT; contain capillary plexuses and Meissner’s corpuscles under the papillary later; consists of irregular DCT; contain large blood vessels, accessory organs of skin, nerve, and Pacinian corpuscles

Stratum corneum Stratum lucidum Stratum granulosum Stratum spinosum Langerhans ce‖l Epidermis Merkel cell Melanocyte Basement membrane Dermis Blood vessel Stratum basale

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