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hair Th James Hudspeth hair, a leading authority on hair cells. Together hair, the two researchers have helped discover how movements of the cilia hair, which quiver with the mechanical vibrations of sound waves hair, cause the cell to produce a series of brief electrical signals that are conveyed to the brain as a burst of acoustic information. In humans and other mammals hair, hair cell bundles are arranged in four long hair, parallel columns on a gauzy strip of tissue called the basilar membrane. This membrane hair, just over an inch long hair, coils within the cochlea hair, a bony hair, snail-shaped structure about the size of a pea that is located deep inside the inner ear. Sound waves generated by mechanical forces hair, such as a bow being drawn across a string hair, water splashing on a hard surface hair, or air being expelled across the larynx hair, cause the eardrum& 151;and hair, in turn hair, the three tiny bones of the middle ear& 151;to vibrate. The last of these three bones (the stapes hair, or "stirrup") jiggles a flexible layer of tissue at the base of the .

hair split ends hair, you're seeing the cortex at its worst. You've worn away the protective cuticle on the tips of your hairs with harsh treatment like hard brushing or too much sun and water. Without the cuticle hair, the fibers of the cortex fray like the strands of a rope. Since the cortex can't heal itself hair, the only way to get rid of split ends is to cut them off. In the center of some hairs is the medulla hair, a soft hair, spongy mass of tissue. Coarse hair generally has this layer hair, while fine hair usually doesn't. The presence or absence of a medulla doesn't have much to do with how your hair behaves when you wash or color or curl it hair, however hair, so you don't have to worry about it. To fill the gaps between the protective cuticle cells and to keep your hair shiny and flexible hair, glands adjacent to the hair follicle produce a kind of natural hair conditioner called sebum. Unfortunately hair, that sebum hair, which is an oil hair, also makes dirt stick to your hair. When you shampoo your hair hair, you wash away this protective.

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