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Hair growth can be stimulated by combining certain skin cells, which can rejuvenate old cells and cause them to specialize in hair follicle creation.

Marsupial hair structure and keratin distribution are similar to placental mammals.

The cuticle significantly contributes to hair stiffness, making up about 60% of the total bending stress.

C-tactile nerves are sensitive to hair movement.

Retinoic acid receptors are important for hair follicle development.

Heterotypic cell contacts likely help hair matrix cells differentiate during mouse hair follicle development.

The effects of estrogen on human hair growth are unclear and need more research.

The document concludes that hair follicles have a complex environment and our understanding of it is growing, but there are limitations when applying animal study findings to humans.

The research provided a detailed view of the non-keratinous parts of human hair fibers.

Growing hairs are easier to pull out than resting hairs due to different anchorage strengths.

Trichohyalin makes hair follicles stronger.

Keratin fibrils in hair form and stop growing at specific points in the follicle.

The method effectively measures hair elasticity and could be useful in forensics.

Certain skin cells near the base of hair muscles may help renew and stabilize skin, possibly affecting skin disorder understanding.

The model shows that factors like follicle shape and stiffness are key for hair growth and anchoring.

Muscles and nerves that cause goosebumps also help control hair growth.

Hair is important for social and sexual communication in humans.

The hairless gene is crucial for hair health, and its mutations cause hair loss.

Understanding hair follicle anatomy helps diagnose hair disorders.

Trichohyalin is a protein in hair follicles that helps form hair filaments.

High-resolution x-ray images showed three main structures in human hair: medulla, cortex, and cuticle.

Hair keratins are mainly on macrofibrils in the cortex and in the endocuticle in the cuticle.

The hair follicle's connection to connective tissue is weaker than the skin's.

Arginine converts to citrulline in hair follicles as proteins harden.

ARHGEF3 is essential for proper hair follicle development.

Hair in mammals likely evolved from glandular structures, not scales.

EREG therapy may help treat hair loss by promoting hair growth.

Hair growth is controlled by specific gene clusters and proteins, and cysteine affects hair gene expression in sheep.