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Skin Histology

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Chapter 5 Skin Histology Dermis J.F. Thompson, Ph.D. The Dermis - General primarily irregular dense fibrous conn. tissue variable thickness - thicker on palms and ... – PowerPoint PPT presentation

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Title: Skin Histology


1
Chapter 5
  • Skin Histology
  • Dermis
  • J.F. Thompson, Ph.D.

2
The Dermis - General
  • primarily irregular dense fibrous conn. tissue
  • variable thickness - thicker on palms and soles
    thicker on dorsal surfaces rather than on
    ventral thicker on lateral surfaces rather than
    on medial surfaces
  • few cells present - fibroblasts, macrophages,
    adipocytes
  • matrix thick with many protein fibers collagen,
    elastin, reticular
  • the location for blood vessels, nerves and
    sensory receptors, sweat and oil glands, and hair
    follicles

3
Dermis - Structure
  • Papillary region (layer) - superficial layer -
    20
  • areolar connective tissue, elastic fibers
  • dermal papillae mound-like projections to
    increase the surface area for nutrition from
    capillaries
  • some papillae contain Meissner's corpuscles (for
    light touch)

4
Dermis Structure (cont.)
  • Reticular region - 80
  • dense, irregular fibrous connective tissue
  • collagen, elastic fibers in a network surrounding
    the various cells
  • fibers give strength, elasticity, extensibility
  • tears in reticular region - "stretch marks -
    long straight red or white streaks

5
Dermis
Papillary and Reticular Regions
6
Meissners Corpuscles
7
Pacinian Corpuscles
8
End Ch 5
  • Skin Histology
  • Dermis
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