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Created with Fabric.js 1.4.5 Integumentary System Function: Protection: -Mechanical damage-Chemical damage-UV light-Thermal DamageMaintaining Homeostasis:-Dessication-Excretion-Synthesis of Vitamin D How Accomplished: - -Physical Barriers, 1st line of defense, Keratin-Keratin, Nerve cells-Melanin-Heat, Cold, and Pain receptors -Waterproofing (Keratin)-Perspiration-Converts cholesterol to Vitamin D in presence of UV Histology: Epidermis-Keratinized stratified squamous epitheliumDermis-Dense connective tissue,collagen, and elastic fibersHypodermis/Subcutaneous-Adipose and areolar tissue Structures: Epidermis-Durable "overcoat" for the body-Newly formed cells push up through the layers every 25-45 days Dermis-"hide"-makes skin flexible and strong-contains blood vessels, sweat and oil glands, pacinain corbuscles, phagocytes Hypodermis/Subcutaneous-Provides insulation, cushioning, shock absorption, and helps anchor skin to the body Melanocytes-produce pigment melanin-gives skin color-stimulated by sunlight-protection for stratum basale cell nuclei Levels of Organizationand Transport and Relation to the other systems: -The Integumentary system lines and protects the whole outer body. Thus, this system protects all other systems. -Epithelial Cell-> Epithelial Tissue-> Epithelium-> Epithelium or Integument Covering the Body->Boy-This system has nerve ends which react to heat and cold by transporting messages to the brain. This enables a person to detect temperature changes.
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