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What is the size of a human hair?
the diameter of human hair varies from about 40 microns to 120 microns. a micron or micrometer is a millionth of a meter. Copy paper thickness is about 100 microns (or 0.1 millimeter).
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Which branch of anthropology would study human characteristics including hair color height skin color and brain size?
Which field of anthropology studies human characteristics including hair color height skin color brain size?
Human hair varies from about 40 microns to 120 microns.
I'm pretty sure its to keep warm like if u had no eyebrows or your bald ,lets say all the hair on your body was gone you would be chili most of the time Humans are mammals, an…d this is a common characteristic of the class. Hair is useful for many things in mammals, protection, warmth, camouflage, and so on.
ten thousand times
No. Bones are calcium-based and are part of the skeletal system. Hair is protein-based and are part of the integumentary system. Hair is made of a special type …of protein known as keratin. It is the same material that makes your finger and toe nails.
The "hair" used for "barbie" and other dolls of similar kinds, i.e. Bratz, my little pony, other dolls with brush-able hair, knock off brands etc. is a synthetic fiber. Usuall…y a low grade of toykankalon or kanekalon. The main difference between these two types of synthetic fiber is that one is heat sensitive while one is heat resistant. Human hair is far too expensive for the global yearly mass production of dolls and toys. Human hair is also unhygienic and far too delicate for an application such as this. Some very exclusive dolls made before the mass production of dolls such as "barbie" had human hair, however those dolls were cherished art forms not extrusion plastic and intended for today's consumer "throw-away" culture.
Hair is primarily made of a special type of protein called "keratin." Keratin is the same tough, water insoluble material that fingernails and animal horns and hooves are made… of. Hair also contains natural oils (lipids) and water. These hair "ingredients" are arranged in 3 primary structures: the cuticle (which is the outermost, shingle-like layer); the cortex (the inside of the hair consisting of bundles of protein filaments; and the medula (a soft spongy-like core in the center of the cortex.)
(Yaki) is a hair texture that is designed to look and feel like African American Hair (Black Peoples) that has been through a processing to make their own hair straight. This …processing is called Relaxing.
some of it
The root hair single cell is 80 - 1500um long. Its diameter is 5-17um. The root hair cell life is 2-3 weeks.
80 thousand nanometer
No, it is not.
40,000 to 120,000 nanometers.
The dog hair is clearly thicker. It appears to have a diameter of ~30µm while the human hair is ~25µm thick. The segments of the dog hair appear to be smaller. They appear t…o be about 10µm while the human hair is ~15µm. Also the human hair appears to have more uniform segments than that of the dog hair. The human hair has higher roughness of 2.398 µm, while the dog hair has a roughness of 618.3 nm.Source: www.asylumresearch.com/Humanvsdog.ppt
Animal hair, also known as fur, and human hair are both essential to the host creatures' environmental comfort and temperature regulation. However, the composition and structu…re of the two hair types are distinctly different.GrowthHuman hair grows and sheds continuously. Its length and style are maintained through regular haircuts. Most animal hair, in contrast, in self-limiting and sheds seasonally. Its length is regulated biologically, meaning that it grows to a specific length, determined genetically, and then ceases to grow.IndentificationAccording to Web MD, strands of human hair carry chemical information which is specific to an indivudual, and which can be used for indentification. Animal hair, however, is indistinct, meaning that hair from two different animals of the same breed have no distinct difference, and cannot be used to identify an individual. In either case, according to the FBI, genetic information can only be accessed if the hair follicle is still attached to the root of the hair.LayersHuman hairs are all the same type of strand. Many animals, however, have two distinct layers of fur made up of hairs with different properties. The top layer is long and coarse, and the undercoat is short and fine. This two-layer coat type helps animal coats repel water, and protects the skin from extreme temperatures.SpecializationMany animals have specialized hair types that serve specific biological functions. For example, whiskers are a specialized hair which are connected to the nervous system, and which receives sensory information. They affect an animal's balance, sense of direction and depth perception. Similarly, porcupines and hedgehogs have modified hair strands called quills or spines, which act as defense mechanisms.