Tiny sea skaters, as insect ocean pioneers, may hold the secret to developing improved water repellant materials. A KAUST study also provides insights into the insect's physical features, including the hairs and waxy coating ...
Ecology
May 15, 2020
0
780
With the coronavirus pandemic temporarily shuttering hair salons, many clients are appreciating—and missing—using hair dye to cover up grays or touch up roots. Whether done at a salon or at home, frequent coloring, however, ...
Materials Science
Apr 29, 2020
0
50
The tiny hairs found on plant roots play a pivotal role in helping reduce soil erosion, a new study has found. The research, led by the University of Bristol and published in Communications Biology, provides compelling evidence ...
Plants & Animals
Apr 03, 2020
1
253
Skin is protective against physical injury, radiation and microbes, and at the same time, produces hair and facilitates perspiration. Details of how skin cells manage such disparate tasks have so far remained elusive. Now, ...
Biotechnology
Feb 27, 2020
0
9
Scientists have solved a puzzle that has long baffled botanists—why some plants on high mountainsides are hairy while their low-lying cousins are bald.
Biotechnology
Feb 27, 2020
0
4
A research team of Vanderbilt engineers that includes a scientist at Oak Ridge National Laboratory has demonstrated a new ultrathin filter, based on metamaterials, that allows for analog optical image processing. Their work, ...
Optics & Photonics
Feb 25, 2020
0
71
Root hairs are tubular polarized extensions of root epidermal cells and are crucial for plant anchorage, nutrient acquisition, and environmental interactions. The plant hormone jasmonate has been reported to promote root ...
Biotechnology
Feb 24, 2020
0
8
Men are losing more than just their hair when they go bald, new University of Otago research shows.
Social Sciences
Feb 05, 2020
0
4
RUDN astrophysicists have proposed a new method for approximate calculation of the parameters of spherically symmetric black holes in the Einstein-Maxwell theory. By comparing the shadow radii of the black holes obtained ...
Astronomy
Jan 29, 2020
31
110
Why are Irish Setters so red? Geneticists at the UC Davis School of Veterinary Medicine now have an answer for why some dogs have more intense coat colors than others.
Evolution
Jan 15, 2020
0
81
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
