Integumentary System PDF

HOME BACKGROUNDS AVATAR KIT PLANNERS HOMEWORK THE INTEGUMENTARY SYSTEM Anatomy 110 Pittsburgh Institute of Mortuary Science  COURSE OBJECTIVE Demonstrate technical skills in embalming and restorative art that are necessary for the preparation and handling of human remains L...

HOME BACKGROUNDS AVATAR KIT PLANNERS HOMEWORK THE INTEGUMENTARY SYSTEM Anatomy 110 Pittsburgh Institute of Mortuary Science  COURSE OBJECTIVE Demonstrate technical skills in embalming and restorative art that are necessary for the preparation and handling of human remains LECTURE OBJECTIVE Identify and describe the major layers and accessory structures of the integumentary system  OVERVIEW FUNCTIONS LAYERS ACCESSORY STRUCTURES GLANDS OVERVIEW Integumentary – relating to the outer surface of a structure, i.e. the skin and its components Integument is made up of the skin and the connective tissues beneath it Skin itself is a cutaneous membrane that forms a sheetlike covering A layer of fat beneath the skin supplies nutrients, cushions the body, and connects skin to muscle and deeper layers (hypodermis or subcutaneous tissue) OVERVIEW FUNCTIONS LAYERS ACCESSORY STRUCTURES GLANDS FUNCTIONS PROTECTION TEMPERATURE EXCRETION First line of defense Sweat secretions, Sweat + evaporation against microbes and blood vessel dilation & other hazards contraction VITAMIN D SYNTHESIS SENSE ORGAN ACTIVITY Via exposure to UV light Nerve endings send signals to the brain  OVERVIEW FUNCTIONS LAYERS ACCESSORY STRUCTURES GLANDS LAYERS OF THE SKIN - EPIDERMIS Epidermis – outermost layer of the skin 5 tightly packed layers Outermost layer – stratum corneum Dermis + epidermis meet at dermal-epidermal junction Melanocytes produce melanin in the deepest layer of the epidermis  OVERVIEW FUNCTIONS LAYERS ACCESSORY STRUCTURES GLANDS LAYERS OF THE SKIN - DERMIS Dermis – deeper layer of the skin Made up of mostly connective tissue Contains lots of blood vessels Collagen and other fibers help to keep the skin elastic and strong Contains two main layers  OVERVIEW FUNCTIONS LAYERS ACCESSORY STRUCTURES GLANDS HAIR Hair stems from pocketlike structures called follicles Lips, palms, and soles of the feet are hairless Hair follicles extend into the dermis Arrector pili are tiny, involuntary muscles  OVERVIEW FUNCTIONS LAYERS ACCESSORY STRUCTURES GLANDS NAILS Nails grow from the epidermis Nail body is the visible (but non-living) portion Root is hidden by the cuticle Lunula is a the crescent-shaped portion near the root end  OVERVIEW FUNCTIONS LAYERS ACCESSORY STRUCTURES GLANDS GLANDS Gland – a secretory organ or structure that can manufacture a secretion Sudoriferous glands are sweat glands Sebaceous glands are sebum glands  OVERVIEW FUNCTIONS LAYERS ACCESSORY STRUCTURES GLANDS GLANDS – SUDORIFEROUS (SWEAT) Located in the dermis, originate in the epidermis Eccrine glands are distributed around the entire body Secrete sweat Apocrine glands are found in the axilla and around the genitals Secrete a thicker solution  OVERVIEW FUNCTIONS LAYERS ACCESSORY STRUCTURES GLANDS GLANDS – SEBACEOUS (SEBUM) Secrete sebum which is an oil that lubricates hair and skin Present anywhere that hair grows Attached to hair follicles VOCABULARY CHECK 💙 Integumentary 💙 Gland  CONCEPT REVIEW Integument Layers Functions Accessory structures Hair Nails Glands Sudoriferous glands Sebaceous glands LECTURE OBJECTIVE Identify and describe the major layers and accessory structures of the integumentary system  COURSE OBJECTIVE Demonstrate technical skills in embalming and restorative art that are necessary for the preparation and handling of human remains