Dermis Layers, Function & Structure

Dermis Layers, Function & Structure

Layers of Dermis

The dermis consists of two layers:

• Papillary layer: It is superficial and forms one-fifth of the total thickness of dermis. It sends finger-like projections (called dermal papillae) towards epidermis.
• Reticular layer: It is a deep layer and contains course bundles of collagen fibres. It also contains blood vessels and nerves.

“Comprehensive Overview Of The Dermis And Its Significance In Skin Health”

“Best Ways To Understand Dermis Structure And Function”

Question 2. What are cleavage lines/Langer’s lines? Mention their clinical significance.
Answer.

These are lines on the surface of the skin. They are produced by the pull of collagen fibres present within the dermis, and radiate in definite directions. They correspond to the natural orientation of collagen fibres in dermis. In general, the Langer’s lines tend to run longitudinally in the limbs and circumferentially in the neck and the trunk.

“Importance Of The Dermis In Skin Health”

Layers of Dermis Clinical significance

The knowledge of orientation of these lines is of special interest to surgeons as:

• Incisions made parallel to these lines heal rapidly and produce hair-line scar (due to formation of less scar tissue).
• Incisions made across these lines heal poorly and produce wide scar (due to formation of more scar tissue)

“Understanding The Role Of Collagen In Dermis Strength”

 Appendages of the Skin?

Appendages of the skin:

• Hair
• Sweat glands
• Sebaceous glands
• Nails