Integumentary System

Integumentary System - Integumentary System History of...

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Integumentary System
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History of Keratinocyte Produced by stem cells in stratum basal Mitosis Cytoskeleton increases Produce lipid filled vesicles Stratum Granulosum Keratinocytes- apoptosis- designed to die Keratinohylin granules bind to intermediate filaments- keratin Vesicles release lipids Epidermal water barrier between stratum spinosum and granulosum structure- lipids screted by keratinocytes tight junctions layer of insoluble proteins
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Functions Protection Chemical barriers Physical barriers Regulation of body temperature Receptors Synthesis of vitamin D Excretion Blood reservoir
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Epidermis Cell types Keratinocytes Keratin Desmosomes Melanocytes – melanin Melanosomes Cells of Langerhans Immunity Merkel cells Touch
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Epidermis Stratified squamous epidermis Cell layers Stratum basale = stratum germinativum Mitosis Melanocytes Stratum spinosum Cytoskeleton = intermediate filaments attached to desmosomes Cells of Langerhans Melanin granules
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Integumentary System - Integumentary System History of...

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