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- Hair
Biology - skin and hair biology.
An introduction to the structure and function of the skin and
hair.
- Hair
Biology - hair follicle embryogenesis overview.
An introduction to the structure and embryonic development
of
hair follicles.
- Hair
Biology - hair follicle embryogenesis in detail.
A more detailed explanation of what happens in hair follicle embryogenesis
and the nature of the hair follicles and fiber that is formed.
- Hair
Biology - molecular mediators of hair follicle embryogenesis.
Hair follicle embryogenesis is a complicated process that
is regulated by numerous genes. While the molecular mediation
of hair follicle development is not fully understood, this
article reviews some of the key genes and their products
that seem to be involved.
- Hair
Biology - hair follicle structure overview.
An introduction to the basic hair follicle and
the key components of the structure.
- Hair
Biology - hair follicle anatomy.
A review of the anatomy of an adult hair follicle.
- Hair
Biology - hair follicle infundibulum, isthmus, and suprabulbar
region. A review of the
hair follicle infundibulum, isthmus, and suprabulbar region.
- Hair
Biology - hair follicle bulb.
An evaluation of the hair follicle bulb region and its function.
- Hair
Biology - hair follicle dermal papilla.
The hair follicle bulb contains a cluster of cells called
the dermal papilla. The dermal papilla is a key component
of the hair follicle without which hair fiber would not
grow.
- Hair
Biology - hair follicle outer root sheath.
A review of the hair follicle outer root sheath and its
function in hair follicle growth.
- Hair
Biology - hair follicle inner root sheath.
The hair follicle inner root sheath has an important role
to play in protecting and encouraging the hair fiber to
grow from the hair follicle.
- Hair
Biology - hair fiber.
In terms of hair growth the hair fiber is the most
important part of the hair follicle (natch). Hair fiber
can come in a variety of structural presentations reflecting the type
of hair follicle that produces the hair fiber.
- Hair
Biology - types of hair fiber.
A brief overview on the different types of hair fiber found in humans.
- Hair
Biology - hair follicle growth cycle overview.
Explaining the hair follicle growth cycle in humans and other animals.
- Hair
Biology - anagen stage of the hair follicle growth cycle.
The anagen stage in the hair follicle growth cycle is the
key hair fiber producing part of the growth cycle when the
hair follicle is most active.
- Hair
Biology - catagen stage of the hair follicle growth cycle.
The catagen stage of the hair follicle growth cycle and
when it occurs is important for understanding hair
loss disease and hirsutism. If catagen occurs too soon in
the growth cycle alopecia can develop. If catagen onset
is delayed, hair can grow longer and hirsutism may be the
result.
- Hair
Biology - telogen stage of the hair follicle growth cycle.
The telogen stage of the hair follicle growth cycle is the
relatively quiet period when the hair follicle rests and
the hair fiber stops growing.
- Hair
Biology - exogen stage of the hair follicle growth cycle.
The exogen stage of the hair follicle growth cycle has only
been described relatively recently. Exogen describes the
phase of the cycle when the hair fiber is shed. Previously
this was believed to be a passive event, but now there is
some evidence that old hair fibers needs to be actively shed.
- Hair
Biology - relation of hair growth to the whole skin.
The hair follicle does not grow in isolation, it is an integral
part of the skin. As the hair follicle grows and cycles
it affects the rest of the skin. This page reviews the interaction
between the hair follicle and the surrounding skin.
- Hair
Biology - functions of the hair follicle and hair fiber.
Hair follicles don't just grow hair fiber to make you look
pretty. They do other stuff too.
- Hair
Biology - how and why does the hair follicle cycle.
Hair follicles on most mammals (though not all) go through a cycle
of anagen growth, catagen regression, telogen rest, and
exogen shedding before entering a new growth phase and production
of a new hair fiber. Why this happens is not understood,
but there several hypotheses as to why and how it happens.
- Hair
Biology - hair follicle growth cycle regulation.
There are many cellular, molecular, and biological mechanisms
involved in regulating hair growth. This page provides an
overview.
- Hair
Biology - ethnic differences.
Some comments on ethnic differences in hair fiber and
hair follicle growth characteristics.
- Hair
biology - human "hairless" gene.
An important step in hair disease research was made with the discovery
of the human hairless gene, the first gene to be identified that
causes hair loss. This article discusses the nature of the discovery
and what it means for future research and treatment development.
- Hair
Biology - maximum scalp hair length.
What is the maximum length scalp hair can grow to.
- Hair
biology - hair follicle growth rates.
How quickly does hair grow on different parts of the body and
at different ages.
- Hair
biology - hair fiber composition.
Hair fiber is primarily made from keratins that are produced by
hair follicles from amino acids.
- Hair
biology - seasonal shed rates.
Like other animals, humans have changes in their rate of hair
shedding depending on the seasons.
- Hair
biology - hair strength. Hair
is very strong, you can even hang by your hair.
- Hair
biology - hair density. The density
of scalp hair varies with age and hair color.
- Hair
biology - questions and answers.
Some miscellaneous questions and answers about hair biology.
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- Bookstore
- dermatology / hair disease books. Links
to the online internet bookstore Amazon.com for books about
hair and hair diseases primarily written for dermatologists,
trichologists and those in related professions
- Bookstore
- hair loss books. Links to the online
Internet bookstore Amazon.com for popular consumer books
about androgenetic alopecia (pattern baldness), other forms
of baldness and their treatment
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