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Chapter 5 Power Point A&P I

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  • What is the integumentary system made of?

    Hair, skin, nails, glands

  • What are the layers of the skin? (superficial to deep)

    Epidermis, Dermis, Subcutaneous Layer (hypodermis)

  • What is the job of the subcutaneous layer?

    Attach the dermis to underlying tissues

    Stores fat

    Insulates

    Contains Pacinian corpuscles that detect pressure

  • What is the epidermis composed of?

    Keratinized stratified squamous epithelium

  • What is the primary cell type in the epidermis and what does it produce?

    Keratinocytes

    Produces keratin

  • What is the function of keratin?

    Toughens skin and makes it waterproof

  • What is the second cell type in the Epidermis and what do they produce?

    Melanocytes

    Produces Melanin

  • What is the purpose of melanin?

    Absorbs UV light

    Contributes to skin color

  • What is the third type of cell in the epidermis and what is its function?

    Langerhans cells

    Aid in immune response

  • What is the fourth type of cell in the epidermis and what is its function?

    Merkel Cells

    Detect Touch

  • What are the Epidermal Layers (deep to superficial)?

    Beautiful Skin Glows Like Crystals

    Stratum Basale

    Stratum Spinosum

    Stratum Granulosum

    Stratum Lucidum

    Stratum Corneum

  • What type of tissue is the dermis made of?

    Mostly Connective Tissue

  • Does the Dermis have a blood supply?

    Does the Dermis have nerves?

    Yes it have nerves and is vascular

  • What are the two layers of the Dermis?

    Papillary Region

    Reticular Region

  • What does the papillary region contain?

    Dermal Papillae

  • What does the Reticular region contain?

    Sebaceous glands

    Sudoriferous glands

    Collagen

    Elastic Fibers

    Epidermal Ridges

  • What does collagen and elastic fibers provide?

    Extensibility

    Elasticity

  • What are the six functions of the skin?

    Temperature Regulation

    Blood Reservoir

    Protection

    Cutaneous Sensations

    Excretion and Absorption

    Synthesis of Vitamin D

  • How does sweat contribute to temperature regulation of the body?

    Sweat evaporates off the skin cooling the body

  • What are three things in the skin that protect the body?

    Keratin

    Lipids

    Sebum

  • What are the 2 places thick skin is found?

    Palms and soles of feet

  • What layer of skin does thick skin have that thin skin doesnt?

    Stratum Lucidum Layer

  • Thick skin is absent of what?

    Hair follicles, arrector pili (goosebumps), sebaceous glands

  • Thick skin has lots of what?

    Sudoriferous glands (memory trick see and hear odor in the word and sweat has an odor)

  • What are the accessory structures?

    Hair

    Glands

    Nails

  • What are 3 glands found in skin and what do they contain?

    Sebaceous glands- Sebum (Oil)

    Sudoriferous glands- Sweat

    Ceruminous glands- Cerumen (ear wax)

  • Where do we not have Sebaceous glands?

    Palms and soles of our feet

  • What is the purpose of Sebaceous Glands?

    Soften skin and hair

    inhibits bacterial growth

  • What are Sebaceous Glands made of?

    triglycerides, cholesterol, proteins, pheromones, salts

  • What skin color is an indication of Jaundice?

    Yellow Skin (liver disease)

  • What skin color is an indication of Erythema?

    Redness of skin (heat or infection)

  • What skin color is an indication of Cyanosis?

    Blue skin (lack of oxygen)

  • What skin color is an indication of Pallor?

    Pale Skin (anemia and shock)

  • What are the A,B,C,D,E warning signs of cancer?

    A- Asymmetry

    B- Border

    C- Color

    D- Diameter

    E- Elevation

  • Burn that involves only the epidermis

    First Degree Burn

  • Burn that destroys the epidermis and part of the dermis

    Second Degree Burn

  • Burn that destroys the epidermis, dermis and underlying tissue

    Third Degree Burn

  • Burn that destroys all skin layers and underlying tissue

    Fourth Degree Burn