1 Hair shaftHair shaft is the visible part of the hair that protrudes through the skin It consists of layers of of fused, dead, keratinized cells 2 MedullaThe innermost layer of a hair is called the medulla A medulla is not present in all hairs, only in large thick ones eg protruding from the scalp rather than from the abdomen or upperarms (where hairsHair is a keratinous filament growing out of the epidermis It is primarily made of dead, keratinized cells Strands of hair originate in an epidermal penetration of the dermis called the hair follicleThe hair shaft is the part of the hair not anchored to the follicle, and much of this is exposed at the skin's surface The rest of the hair, which is anchored in the follicle, lies below theRoot hair cells Higher To maintain the concentration gradient and so the constant movement of water into the root hair cell by osmosis, the root hair cell actively transports mineral salts into
What Is The Cellular Structure Of A Root Hair Cell Quora
