integumentary system n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Integumentary System PowerPoint Presentation
Download Presentation
Integumentary System

Loading in 2 Seconds...

play fullscreen
1 / 12

Integumentary System - PowerPoint PPT Presentation


  • 84 Views
  • Uploaded on

Integumentary System. Covering and Lining Membranes. composed of epithelium bound to an underlying connective tissue. Mucous membranes: line body cavities that are open to the outside. Cutaneous membrane: the skin Serous membranes: line closed ventral body cavities.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Integumentary System' - nalani


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
covering and lining membranes
Covering and Lining Membranes
  • composed of epithelium bound to an underlying connective tissue.
  • Mucous membranes: line body cavities that are open to the outside.
  • Cutaneous membrane: the skin
  • Serous membranes: line closed ventral body cavities.
    • Parietal layer- lines the body cavity
    • Visceral layer covers the organ
    • Serous fluid serves as lubricant between the layers.
skin functions
Skin functions
  • protection of deeper tissue from chemicals, bacteria, injury, and drying
  • regulation of body temperature through radiation and sweating
  • synthesis of defensive proteins and vitamin D.
  • The cutaneous sensory receptors are located in the skin.
  • *Forms a waterproof, stretchy, washable coat that repairs itself when damaged.
skin structure
Skin Structure
  • Epidermis
  • superficial
  • made of stratified squamousepis (contains keratin and lacks blood vessels.)
  • Surface cells are dead and continually flake off and are replaced by division of cells in the basal layer.
  • Melanin, a pigment produced by melanocytes, protects the nuclei of epithelial cells from damaging rays of the sun.
  • Dermis
  • composed of dense connective tissue.
  • site of blood vessels, nerves, and epidermal appendages.
  • has two regions, the papillary and reticular layers. The papillary layer has ridges, which produce fingerprints.
appendages of the skin
Appendages of the Skin

Formed from the epidermis but reside in the dermis.

  • Sebaceous glands – oil glands. Produce sebum (keeps skin and hair soft and healthy). Usually connected by a duct into a hair follicle.
  • Sweat (sudoriferous) glands, under the control of the nervous system, produce sweat, which is connected by ducts to the epithelial surface. Aid in heat-regulation.
  • Hair -primarily dead keratinized cells produced by the hair bulb.
  • Nails -hornlike derivatives of the epidermis. Primarily dead keratinized cells.
homeostatic imbalances of the skin
Homeostatic Imbalances of the Skin
  • Infections and Allergies
  • The most common skin disorders.
  • Ex: ringworm is fungal, staph is bacterial, nail fungus, and allergic reactions to poison ivy.
burns
Burns
  • result in loss of body fluids and invasion of bacteria
  • represent a major threat to the body.
  • The severity of the burn depends on the depth of tissue destruction.
burns cont
Burns, Cont.

◘first-degree

epidermal damage only

◘ second-degree

epidermal and some dermal injury

◘ third-degree

epidermis and dermis totally destroyed

**Third-degree burns require skin grafts.

skin cancer
Skin Cancer

◘ most common cause is exposure to ultraviolet radiation.

◘ Cure of basal cell and squamous cell carcinoma is complete if they are removed before melanoma, a cancer of melanocytes, forms. It is still fairly rare but is fatal in about half the cases.

developmental aspects of skin
Developmental Aspects of Skin
  • The skin is thick, resilient and hydrated in youth, but loses elasticity and thins as aging occurs.
  • Balding and/or graying occurs with aging. Both have genetic links, but can result from other factors such as drugs, emotional stress, etc.