The Structure of Hair

Structure of Hair Dr. Ali N. Syed Dr. Narjis A. Askar www.dralisyed.com (revised July 3, 2008)

The Cuticle ,[object Object],[object Object],[object Object],[object Object],1. C.R. Robbins in chemical and Physical Behavior of Human Hair.

Structure of Cuticle ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Endocuticle Exocuticle Epicuticle A-Layer CMC

Epicuticle ,[object Object],[object Object],[object Object],Epicuticle CMC

Surface Membrane of Cuticles Source:Menacham Lewin. 2007. P.339

A-Layer ,[object Object],[object Object],[object Object],[object Object],A-Layer CMC

Exocuticle ,[object Object],[object Object],Exocuticle CMC

Endocuticle ,[object Object],[object Object],[object Object],Endocuticle CMC

Cell Membrane Complex ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],CMC

[object Object],Penetration through the cuticle layers

[object Object],Penetration through the Cuticle Layers Penetration through the cuticle layers

Passage of Shampoo and Conditioner Ingredients from Cuticle to Cortex ,[object Object],Passage of shampoos and conditioners CMC Endocuticle Exocuticle Epicuticle A-Layer

The Cortex ,[object Object],[object Object],[object Object],[object Object],[object Object]

Ortho and Para Cortical Cells – TMA Source: Menachem Lewin. (2007). Fiber Chemistry. P. 334

The Cortex – Hair Types ,[object Object],[object Object],[object Object],Orthocortex Paracortex Cortical CMC

Differences Between Ortho and Para Cortical Cells: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Paracortical Orthocortical

[object Object],[object Object],Differences Between Ortho and Para Cortex:

Hexagonal Array of Microfibrils. Source: Menachem Levin.2007: Fiber Chemistry, p344

The Intermediate Filaments or Microfibrils ,[object Object],[object Object],[object Object],[object Object]

CMC of the Cortical Cells ,[object Object],[object Object],[object Object],[object Object],Cortical CMC

The Macrofibrils ,[object Object],[object Object],[object Object],[object Object],[object Object],Macrofibrils Microfibrils Intermicrofibrillar matrix Matrix

The Matrix: ,[object Object],[object Object],Macrofibrils Microfibrils Intermicrofibrillar matrix Matrix

[object Object],[object Object],The Matrix:

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The Intermediate Filaments or Microfibrils . Protein Chain Coiled-coil (Dimer) Profilament (Tetramer) Protofibril (Octamer) Microfibril 70 A

[object Object],[object Object],[object Object],[object Object],[object Object],The Intermediate Filaments or Microfibrils

MICROFIBRIL Microfibril Protofibrils (4) Protofilament (8) Coiled - Coil (Dimer) (16) a Helix (32) Hierarchy ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The  -Helix Dimer ,[object Object],[object Object]

The Polypeptide Chains ,[object Object],[object Object],[object Object]

The Amino acids ,[object Object],[object Object]

The Medulla ,[object Object],[object Object],[object Object]

The Melanin Granules ,[object Object],[object Object],[object Object],[object Object]

The Structure of Hair

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The Structure of Hair