際際滷

際際滷Share a Scribd company logo

A&P

Download as PPTX, PDF
S
Sarah Drabwell

The document summarizes the functions of the skin and nails. It describes the 7 main functions of the skin as sensation, heat regulation, absorption, protection, excretion, secretion, and vitamin D production. It then lists and describes biological and environmental factors that cause skin aging. The document also identifies and describes the key structures of the nail, including the matrix, nail bed, nail groove, hyponychium, free edge, nail plate, and lunula. It explains the functions of the nails are to aid manipulation, heighten touch, provide rigid finger support, and protect the finger tip.

1 of 11
Download to read offline
30th September 2014 Recall appendages of the skin & layers of the skin Identify & describe the functions skin Describe / Explain factors that cause ageing Describe functions of the nails Identify the structures of the nail Describe the nail growth & factors that effect growth
Sensation Heat regulation Absorption Protection Excretion Secretion Vitamin D production There are 7 main functions of the skin and these are:
Sensation Acts as a sense organ to detect changes in the environment such as heat, cold, touch, pressure and pain. Heat regulation Helps to keep body at a constant temperature of 37 C by dilation (widening) and constriction (narrowing) of the blood vessels. Sweat evaporation also keeps the body cool. The subcutaneous fat insulates the body.
Absorption The skin has a limited amount of absorption properties. It can absorb certain particles that are small enough to be absorbed such as female hormones, nicotine patches, ingredients within facial preparations etc
Protection A waterproof coat protects the body against dirt, bacterial infection and chemical attack. Acid mantle pH 5.5 ( made up from sebum and sweat) discourages growth of bacteria and also fungi. The horny layer of the epidermis acts as a filter against bacteria. Melanin in the epidermis protects against damage form ultra violet rays.
Excretion Waste products such as lactic acid, urea and salts are lost through perspiration, however this is only a minor function Secretion Sebum is secreted by the sebaceous glands. Vitamin D production This occurs due to the reaction of sunlight on the skin producing a chemical reaction
Factor Description Affect Skin ageing Biological Collagen & Elastin Structure Prolonged Exposure to UV Smoking Poor Diet Group Work:
Recall Functions of the skin
The functions of the nail are to: Aid manipulation Heighten the sense of touch Provide rigid support at the end of the finger Protect the end of the finger bone Scratch and groom Nail Functions
Hyponychium Nail Groove Nail bed Matrix Free Edge Nail plate Lunula Cuticle
Name Location Function Matrix Below the cuticle Reproduces new cells, to form the nail plate Nail bed Under nail plate Supplied with nerves,blood and lymph. It gives the nail the pink colour.Supply nourishment Nail grooves 1.At either side of the nail bed2.underside of plate Guides the nail as it grows, to help it grow straight Hyponychium Skin just under free edge Protective seal, defends against infection of the nail bed Free edge Part of the nail that extends beyond the finger. Protects finger tips, and hyponychium Nail plate Visible part of the nail Protects the nail bed Lunula White crescent at the base of nail. Situated between the matrix and the nail plate This is where cells start to harden for the nail plate Cuticle The skin surrounding the base of the nail Provides a protective seal, against bacterial infections of the matrix

More Related Content

A&P

  • 1. 30th September 2014 Recall appendages of the skin & layers of the skin Identify & describe the functions skin Describe / Explain factors that cause ageing Describe functions of the nails Identify the structures of the nail Describe the nail growth & factors that effect growth
  • 3. Sensation Acts as a sense organ to detect changes in the environment such as heat, cold, touch, pressure and pain. Heat regulation Helps to keep body at a constant temperature of 37 C by dilation (widening) and constriction (narrowing) of the blood vessels. Sweat evaporation also keeps the body cool. The subcutaneous fat insulates the body.
  • 4. Absorption The skin has a limited amount of absorption properties. It can absorb certain particles that are small enough to be absorbed such as female hormones, nicotine patches, ingredients within facial preparations etc
  • 5. Protection A waterproof coat protects the body against dirt, bacterial infection and chemical attack. Acid mantle pH 5.5 ( made up from sebum and sweat) discourages growth of bacteria and also fungi. The horny layer of the epidermis acts as a filter against bacteria. Melanin in the epidermis protects against damage form ultra violet rays.
  • 6. Excretion Waste products such as lactic acid, urea and salts are lost through perspiration, however this is only a minor function Secretion Sebum is secreted by the sebaceous glands. Vitamin D production This occurs due to the reaction of sunlight on the skin producing a chemical reaction
  • 7. Factor Description Affect Skin ageing Biological Collagen & Elastin Structure Prolonged Exposure to UV Smoking Poor Diet Group Work:
  • 9. The functions of the nail are to: Aid manipulation Heighten the sense of touch Provide rigid support at the end of the finger Protect the end of the finger bone Scratch and groom Nail Functions
  • 10. Hyponychium Nail Groove Nail bed Matrix Free Edge Nail plate Lunula Cuticle
  • 11. Name Location Function Matrix Below the cuticle Reproduces new cells, to form the nail plate Nail bed Under nail plate Supplied with nerves,blood and lymph. It gives the nail the pink colour.Supply nourishment Nail grooves 1.At either side of the nail bed2.underside of plate Guides the nail as it grows, to help it grow straight Hyponychium Skin just under free edge Protective seal, defends against infection of the nail bed Free edge Part of the nail that extends beyond the finger. Protects finger tips, and hyponychium Nail plate Visible part of the nail Protects the nail bed Lunula White crescent at the base of nail. Situated between the matrix and the nail plate This is where cells start to harden for the nail plate Cuticle The skin surrounding the base of the nail Provides a protective seal, against bacterial infections of the matrix