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Hair germ cells differ from epidermal cells in keratin expression, and specific keratins form after hair differentiation.

Male and female scalp hair differ in size, density, length, curliness, pigmentation, and cuticle preservation.

Moisture content significantly affects how human hair breaks.

Alopecic hair has more irregular structures and chemical changes than normal hair, reducing its strength.

Heating human hair creates hollow microtubes with smooth surfaces.

Straight permed hair loses weight faster than virgin hair when heated, but ends up heavier after burning.

All major hair defects involve cuticle abnormalities.

Stretching damages Caucasian hair's structure more easily than Asian hair.

Tianzhu white yak hair varies in structure and density between fuzz and coarse hair.

A new method effectively stains hair samples for study without losing hair sections.

Different S100 proteins have specific roles in various parts of the hair follicle.

FoxN1 gene is crucial for proper thymus structure and normal skin appearance.

Both cyproterone acetate and spironolactone effectively reduce hair growth in women with hirsutism.

Different women's hair and skin glands respond to hormones in varied ways, which can cause unwanted hair growth even with normal hormone levels, and more research is needed to treat this effectively.

Biotin deficiency causes severe hair loss and weight reduction in germ-free mice.

Pili annulati causes zebra-striped hair but doesn't affect hair strength or quality of life.

Wavy sinus hairs in cats are linked to feline leukemia virus infection.

Soaking calf skin in lime solution dissolves cells at different rates, with optimal dehairing after 4-7 days.

The IRF2BP2 gene affects sheep fleece quality by influencing fiber traits.

The document concludes that understanding nail anatomy is key for diagnosing nail diseases, early signs of nail melanoma may allow for less aggressive treatment, and specific genetic mutations are important in thyroid cancer prognosis and treatment.

Mummy hair from the Taklamakan desert has calcium and phosphorus inside.

Spironolactone may help treat excessive hair growth in girls, but more research is needed.

Vimentin, desmin, and laminin help maintain rat skin structure.

Trichohyalin, a protein from pig tongue, was purified and found to have a filamentous structure.

Scientists turned rat thymus cells into stem cells that can help repair skin and hair.

Stress can worsen skin conditions by affecting hormone levels and immune response.

As sheep age, their hair fibers and follicles grow larger and more organized, with no significant differences between males and females.

Microscopes are essential for telling apart human and animal hair in criminal investigations.

Women's hair has more sulfur, and black hair has more calcium than white hair.

Horse skin has a layered epidermis, a dermis with hair follicles, sweat and sebaceous glands, and is supplied by small arteries.