Objectives List functions of skin Explain role of skin in temperature regulation Describe layers...
-
Upload
bonnie-boyd -
Category
Documents
-
view
214 -
download
0
Transcript of Objectives List functions of skin Explain role of skin in temperature regulation Describe layers...
![Page 1: Objectives List functions of skin Explain role of skin in temperature regulation Describe layers of skin and characteristics Explain factors that.](https://reader036.fdocuments.us/reader036/viewer/2022070414/5697c0081a28abf838cc6aa4/html5/thumbnails/1.jpg)
Objectives List functions of skin Explain role of skin in temperature regulation
Describe layers of skin and characteristics
Explain factors that affect skin color
Describe accessory organs of skin
![Page 2: Objectives List functions of skin Explain role of skin in temperature regulation Describe layers of skin and characteristics Explain factors that.](https://reader036.fdocuments.us/reader036/viewer/2022070414/5697c0081a28abf838cc6aa4/html5/thumbnails/2.jpg)
Chapter 5: Integumentary System
![Page 3: Objectives List functions of skin Explain role of skin in temperature regulation Describe layers of skin and characteristics Explain factors that.](https://reader036.fdocuments.us/reader036/viewer/2022070414/5697c0081a28abf838cc6aa4/html5/thumbnails/3.jpg)
Functions
Protection Temperature Regulation
Vitamin D Sensory Excretion
![Page 4: Objectives List functions of skin Explain role of skin in temperature regulation Describe layers of skin and characteristics Explain factors that.](https://reader036.fdocuments.us/reader036/viewer/2022070414/5697c0081a28abf838cc6aa4/html5/thumbnails/4.jpg)
Epidermis
Dermis
HypodermisOr subcutaneous
Structure of the skin
![Page 5: Objectives List functions of skin Explain role of skin in temperature regulation Describe layers of skin and characteristics Explain factors that.](https://reader036.fdocuments.us/reader036/viewer/2022070414/5697c0081a28abf838cc6aa4/html5/thumbnails/5.jpg)
Integumentary System Consists of skin and accessory organs
Skin is 2 regions: Dermis Epidermis
A fatty layer lies deep (hypodermis)
Hair Follicles Skin Glands Nails
Skin is the body’s outer covering and its largest organ.
![Page 6: Objectives List functions of skin Explain role of skin in temperature regulation Describe layers of skin and characteristics Explain factors that.](https://reader036.fdocuments.us/reader036/viewer/2022070414/5697c0081a28abf838cc6aa4/html5/thumbnails/6.jpg)
Epidermis
Tissue type: Stratified Squamous Epithelium
Keratinocytes: make up 90% of cells in epidermis
![Page 7: Objectives List functions of skin Explain role of skin in temperature regulation Describe layers of skin and characteristics Explain factors that.](https://reader036.fdocuments.us/reader036/viewer/2022070414/5697c0081a28abf838cc6aa4/html5/thumbnails/7.jpg)
Epidermis
No direct blood supply Nutrients must diffuse into the epidermis
![Page 8: Objectives List functions of skin Explain role of skin in temperature regulation Describe layers of skin and characteristics Explain factors that.](https://reader036.fdocuments.us/reader036/viewer/2022070414/5697c0081a28abf838cc6aa4/html5/thumbnails/8.jpg)
Cells in the Epidermis
1. Keratinocytes – produce a protein called keratin
2. Melanocytes - make dark skin pigment melanin
3. Merkel cells – associated with sensory nerve endings
4. Langerhans cells – macrophage-like dendritic cells
![Page 9: Objectives List functions of skin Explain role of skin in temperature regulation Describe layers of skin and characteristics Explain factors that.](https://reader036.fdocuments.us/reader036/viewer/2022070414/5697c0081a28abf838cc6aa4/html5/thumbnails/9.jpg)
Epidermis: most superficial
![Page 10: Objectives List functions of skin Explain role of skin in temperature regulation Describe layers of skin and characteristics Explain factors that.](https://reader036.fdocuments.us/reader036/viewer/2022070414/5697c0081a28abf838cc6aa4/html5/thumbnails/10.jpg)
Stratum Corneum: Many layers of dead cells keratinocytes - keratin, Moisture lock
Stratum Lucidum:Stratum Granulosum:Statum Spinosum:Stratum Basale:
![Page 11: Objectives List functions of skin Explain role of skin in temperature regulation Describe layers of skin and characteristics Explain factors that.](https://reader036.fdocuments.us/reader036/viewer/2022070414/5697c0081a28abf838cc6aa4/html5/thumbnails/11.jpg)
Desquamification: shedding of outermost layer of a tissueYour skin constantly sheds dead cells, about 30,000 to 40,000 every minute! That’s 9 pounds per year!
![Page 12: Objectives List functions of skin Explain role of skin in temperature regulation Describe layers of skin and characteristics Explain factors that.](https://reader036.fdocuments.us/reader036/viewer/2022070414/5697c0081a28abf838cc6aa4/html5/thumbnails/12.jpg)
Stratum Corneum: Stratum Lucidum:
Protect from UV Thick layer Only in frequently used areas
Stratum Granulosum:Statum Spinosum:Stratum Basale:
![Page 13: Objectives List functions of skin Explain role of skin in temperature regulation Describe layers of skin and characteristics Explain factors that.](https://reader036.fdocuments.us/reader036/viewer/2022070414/5697c0081a28abf838cc6aa4/html5/thumbnails/13.jpg)
Stratum Corneum: Stratum Lucidum:Stratum Granulosum:
Thin middle layer Layers of keratinocytes Initiate keratinization
Statum Spinosum:Stratum Basale:
![Page 14: Objectives List functions of skin Explain role of skin in temperature regulation Describe layers of skin and characteristics Explain factors that.](https://reader036.fdocuments.us/reader036/viewer/2022070414/5697c0081a28abf838cc6aa4/html5/thumbnails/14.jpg)
Stratum Corneum: Stratum Lucidum:Stratum Granulosum:Statum Spinosum:
Cells interlock to support skin Resist tension Langerhans cells (found more here than other layers)
Stratum Basale:
![Page 15: Objectives List functions of skin Explain role of skin in temperature regulation Describe layers of skin and characteristics Explain factors that.](https://reader036.fdocuments.us/reader036/viewer/2022070414/5697c0081a28abf838cc6aa4/html5/thumbnails/15.jpg)
Stratum Corneum: Stratum Lucidum:Stratum Granulosum:Statum Spinosum:Stratum Basale:
Single layer of cells Rest on basement membrane Cells divide continuously Youngest cells found here Melanocytes & Merkel cells here
![Page 16: Objectives List functions of skin Explain role of skin in temperature regulation Describe layers of skin and characteristics Explain factors that.](https://reader036.fdocuments.us/reader036/viewer/2022070414/5697c0081a28abf838cc6aa4/html5/thumbnails/16.jpg)
Epithelium: layers (on left) and cell types (on right)
![Page 17: Objectives List functions of skin Explain role of skin in temperature regulation Describe layers of skin and characteristics Explain factors that.](https://reader036.fdocuments.us/reader036/viewer/2022070414/5697c0081a28abf838cc6aa4/html5/thumbnails/17.jpg)
Review
1. The functions of the skin include all of the following except:
a. Taking in nutrientsb. Preventing entry of microorganismsc. Retarding water lossd. Regulating body temperature
![Page 18: Objectives List functions of skin Explain role of skin in temperature regulation Describe layers of skin and characteristics Explain factors that.](https://reader036.fdocuments.us/reader036/viewer/2022070414/5697c0081a28abf838cc6aa4/html5/thumbnails/18.jpg)
Review
1. Which layer of the Integumentary System is the foundation for the skin?
a. Epidermisb. Hypodermisc. Dermisd. Stratum Corneum
![Page 19: Objectives List functions of skin Explain role of skin in temperature regulation Describe layers of skin and characteristics Explain factors that.](https://reader036.fdocuments.us/reader036/viewer/2022070414/5697c0081a28abf838cc6aa4/html5/thumbnails/19.jpg)
Review
1. Which of the following is NOT considered an accessory organ of the Integumentary System?
a. nailsb. hairc. arteriesd. glands
![Page 20: Objectives List functions of skin Explain role of skin in temperature regulation Describe layers of skin and characteristics Explain factors that.](https://reader036.fdocuments.us/reader036/viewer/2022070414/5697c0081a28abf838cc6aa4/html5/thumbnails/20.jpg)
Review
1. Which of the following cell types is responsible for sensory in the epidermis?
a. Langerhansb. Keratinocytesc. Melanocytesd. Merkel