What two factors affect the aging of skin

1
What two factors affect the aging of skin?

• Warm-up

2

• What two factors cause us to age?
• Intrinsic genes,
• internal
• Extrinsic environment,
• external

3
Intrinsic

• Begins in the 20s
• Turnover rate decreases

4
Extrinsic

• Sun exposure (breaks down collagen and elastin)
• Facial expressions
• Gravity
• Sleep positions
• Smoking

5
What factors influence skin color?

• Genetics
• Sun exposure
• Pituitary gland (Adrenocorticotropic hormone)

6
Growth and Repair
7

• Epidermal
• cells produced in the stratum basale
• cells are pushed up and are starting to
  degenerate
• cells become keratinized
• cells become tightly
• packed at surface are
• become squamous
• cells shed

8
(No Transcript)
9

• Dermal
• wound
• cells (fibroblasts) quickly reproduce
• dense mass of new connective tissue
• may or may not be replaced by normal tissue
• no continuous regeneration and shedding

10
(No Transcript)