Hair helps to prevent heat loss from the body, because it is able to trap a layer of warm air next to the skin. Hairs in our nostrils filter out dirt, to keep our lungs clean. Hair has two parts: the root and the shaft. The hair root is embedded in the skin and is enclosed in a tiny pit, called a hair follicle. The hair shaft contains the pigment that gives hair its colour. Hair is made of keratin, the same substance found in nails and skin.
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Amit-rajoriya
Hair helps to prevent heat loss from the body, because it is able to trap a layer of warm air next to the skin. Hairs in our nostrils filter out dirt, to keep our lungs clean. Hair has two parts: the root and the shaft. The hair root is embedded in the skin and is enclosed in a tiny pit, called a hair follicle. The hair shaft contains the pigment that gives hair its colour. Hair is made of keratin, the same substance found in nails and skin.