1 / 28

Skin Tutorial Feedback

Explore the intricate structure and vital functions of the skin in this comprehensive tutorial. Learn about the three main layers: epidermis, dermis, and subcutaneous layer, as well as the roles of various components like melanocytes, hair follicles, and glands. Discover how skin acts as a barrier, regulates temperature, and synthesizes vitamin D. This brief chat will enhance your knowledge of skin health, including important conditions like albinism and vitiligo, and how to prevent vitamin D deficiency for overall well-being.

susan-waters
Télécharger la présentation

Skin Tutorial Feedback

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Skin Tutorial Feedback DN4 Dr Viv Rolfe

  2. SKIN STRUCTURE Take 5 minutes to chat through the structures of the skin.

  3. 3 main layers melanocyte Hair shaft EPIDERMIS Arrectores Pilorum DERMIS Sweat gland Sebaceous gland Hair follicle SUBCUTANEOUS LAYER

  4. Sweat gland • Excretion of salts/water • Thermoregulation • Sebaceous gland • Secretion of sebum • Protective film waterproofs skin • Keeps hair soft • Antibacterial • Hair • Eye, ear & nasal hair protects from particles • Scalp hair protects from suns rays • Hairs provide insulation therefore are involved in thermoregulation • Hair follicle • Produces new hair • Hair shaft for insulation • Arretores pilorum • Muscle contracts to make hair erect • Important for thermoregulation and also occurs during fear

  5. Where are the ceruminous glands? In the ear. They help form wax, and along with hair prevents theentrance of foreign bodies.

  6. SKIN FUNCTION

  7. Stratum corneum – dead cells • Stratum lucidium • S granulosum • S spinosum • S basale - mitosis

  8. 1 Protection

  9. What makes the skin an effective barrier? Discuss for 5 minutes.

  10. Barrier Epidermis cells form a barrier of keratin-filled cells(waterproofing) Cells are continually sheding and renewing Sebum contains anti-microbials Hairs are protective (e.g. eye lashes and nasal hairs)

  11. How does the skin tan? Discuss for 5 minutes.

  12. Tanning MELANOCYTES EPIDERMIS DERMIS

  13. The tanning process UV light stimulates enzymes that produce melanin Melanocytes change shape and send out long processes into the tissue Epidermal cells take up melanin from the processes The skin darkens and protects from UV damage by reducing light absorption

  14. Conditions relating to skin colour Albinism - congenital absence of pigment in skin, hair and eyes. Vitiligo -absence of pigment producing white patches.

  15. Vitiligo – patches where melanin is absent Age 27 Age 41

  16. 2 Thermoregulation

  17. 37o HOT!

  18. Skin thermoreceptors Message to brain “ITS HOT” Nerve impulse to sweat glandto perspire and bloodvessels to widen (dilate) Heat is lost as sweat evaporates,and from vessels by convection

  19. Skin thermoreceptors Message to brain “ITS COLD” Nerve impulse to ARRECTOR PILARIS muscle to contract Hairs stand on end to giveinsulation Blood vessels shrink (contract) to minimise heat loss

  20. Hyperthermia or Pyrexia • Body temperature above 40oC • Body temperature severely reduced,becoming dangerous below 37 oC Hypothermia

  21. 3 Vitamin D synthesis

  22. What does vitamin D do in the body?How is deficiency caused?What are the consequences?How could it be prevented?

  23. How is it made? Sunlight produces pro vitamin D in the skin This is transported to the liver and kidney, and active vitamin D is formed.

  24. What does it do? • Vitamin D is involved in calcium balance • It works with the hormone parathyrin to • BOOST Ca++ when blood levels are LOW

  25. Vitamin D deficiency What does it cause? Rickets How could it occur? At high altitude or cold climates where the skin is covered in clothing. In polluted areas where UV rays can’t break through. How can we prevent it?Fish, eggs, liver rich in vitamin D Sunbathing

  26. Skin as a sensory organ

  27. Skin receptors Monitor changes in temperature pressure pain

More Related