Researchers from Mass Eye and Ear have developed a word-score model capable of estimating the amount of hidden hearing loss in human ears.
Jun 28, 2022
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Researchers at the John T. Macdonald Department of Human Genetics and John P. Hussman Institute for Human Genomics at the University of Miami Miller School of Medicine have found that inherited mutations in the MINAR2 gene ...
Jun 23, 2022
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Salk scientists have uncovered an unexpected molecular target of a common treatment for alopecia, a condition in which a person's immune system attacks their own hair follicles, causing hair loss. The findings, published ...
Jun 23, 2022
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Chemicals called parabens, which are found in widely used hair and personal care products, cause harmful effects in breast cancer cells from Black women, according to a new study being presented Sunday at ENDO 2022, the Endocrine ...
Jun 11, 2022
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Eating higher levels of fish, including tuna and non-fried fish, appears to be associated with a greater risk of malignant melanoma, suggests a large study of US adults published in Cancer Causes & Control.
Jun 09, 2022
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Teasing and unwanted hair touching are just some of the negative experiences Black girls go through because of their hair, according to a new study.
Jun 04, 2022
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Millions of people around the world are affected by alopecia areata, an autoimmune disorder that causes hair loss and was thrown into the spotlight after actor Will Smith slapped comedian Chris Rock at the Oscars.
Jun 01, 2022
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In response to a recent column where I mentioned how genetic research is beginning to show us how our DNA may influence our dietary needs, reader Ann F sent me a slew of questions:
May 27, 2022
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Dopamine is an important signaling molecule for nerve cells. Its concentration could not be precisely determined with both high spatial or temporal resolution until now. A new method has now made this possible: A research ...
May 27, 2022
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Reminders from a romantic partner might be an effective way to encourage sunscreen use by people age 50 or older, suggests a study in the May/June issue of The Journal of the Dermatology Nurses' Association.
May 18, 2022
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Hair is a protein filament that grows through the epidermis from follicles deep within the dermis. The fine, soft hair found on many nonhuman mammals is typically called fur; wool is the characteristically curly hair found on sheep and goats. Found exclusively in mammals, hair is one of the defining characteristics of the mammalian class. Although other non-mammals, especially insects, show filamentous outgrowths, these are not considered "hair" in the scientific sense. So-called "hairs" (trichomes) are also found on plants. The projections on arthropods such as insects and spiders are actually insect bristles, composed of a polysaccharide called chitin. There are varieties of cats, dogs, and mice bred to have little or no visible fur. In some species, hair is absent at certain stages of life. The main component of hair fiber is keratin.
The hair can be divided into three parts length-wise, (1) the bulb, a swelling at the base which originates from the dermis, (2) the root, which is the hair lying beneath the skin surface, and (3) the shaft, which is the hair above the skin surface. In cross-section, there are also three parts, (1) the medulla, an area in the core which contains loose cells and airspaces (2) the cortex, which contains densely packed keratin and (3) the cuticle, which is a single layer of cells arranged like roof shingles.
This text uses material from Wikipedia, licensed under CC BY-SA
