Integumentary System

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Integumentary System

• Read pp 96-111 HW pp113-114
• S/A 1, 4, 7, 9, 12, 13, 14
• Clinic ?s 3, 4, 5

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Classification of Body Membranes

• Epithelial membranes
• all of these contain an epithelial sheet, always
  combined with connective tissue

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Epithelial tissue cont

• Cutaneousskin
• exposed to air dry membrane

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Epithelial tissue cont

• Serous
• line internal cavities
• serous fluid (excreted by both epithelial and
  connective tissues), lets organs slide cross
  cavity walls and each other

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Epithelial tissue cont

• Parietallines a specific wall of ventral body
  cavity.
• Visceralcovers the outside of the organs of the
  ventral body cavity.

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academic.kellogg.cc.mi.us
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Epithelial tissue cont

• Mucous
• lines all body cavities that open to exterior
  wet membranes

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Connective Tissue Membranes

• Aka Synovial
• line area surround joints, bursae (sacs of
  connective tissue) tendon sheaths.

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Basic Skin Functions

• Protects deeper tissues from
• mechanical damage
• chemical damage
• bacterial damage
• UV radiation
• thermal damage
• dessication

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Basic Skin Functions

• Temperature regulation
• Aids in excretion of urea and uric acid
• Synthesizes vitamin D
• Sensory input

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The SkinIntegumentary System

• Epidermisouter five layersavascular
• Melaninpigment responsible for reducing skin
  damage from UV
• Dermismade up of dense connective tissue,
  hide, firmly connected to epidermal layer.
  Thickness varies

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13
Appendages of the skin

• Hairguard head, eyes, respiratory tract,
  insulation
• Receptors
• Nailsscale-like modification of epidermis
  transparent

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Appendages of the skin

• Skin glands
• Sweat/sudoriferous glands-- gt 2.5 million!
• eccrineproduce sweat, found all over
• apocrineusually found in axillary and genital
  areas milky secretions precise function is
  unknown.

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Appendages of the skin

• Sebaceous glandsoil glands
• not on palms or soles of feet, ducts usually
  empty into a hair follicle.

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Skin Disorders or Problems

• Herpes simplex
• cold sores, fluid filled blisters

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Skin Disorders or Problems

• Cyanosis
• poor blood circulation turning skin/blood bluish

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Skin Disorders or Problems

• Acneinfection of sebaceous glands

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Skin Disorders or Problems

• Skin cancer
• most common cancer

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Skin Disorders or Problems

• Athletes foot
• itchy, red, peeling condition between toes
  fungal infection

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Skin Disorders or Problems

• Third degree burns
• body loses fluid, destroys entire thickness of
  skin, can lead to infection.

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Skin Disorders or Problems

• Blister
• friction between epidermis and dermis causes
  separation of the layers.