Connected with the follicles are muscles called Arrectores Pilorum, which make the expression 'their hair stood on end.', no idle figure of speech. The same muscles have another unpopular function - by contracting, they cause goose flesh. One or more sebaceous glands are also attached to each follicle. When we speak of the form of hair, we mean it is straight, wavy, curly or kinky. The shape of the individual hair shaft is generally related to the form of the hair.
Straight hair is round, wavy hairs are oval, kinky and curly hairs are usually flat.
The follicles of straight hair usually point to the surface of the skin. The follicles of the other types of hair are curved. The greatest curve is present in follicles of kinky hair. The texture of hair would mean its degree of coarseness or fineness. It could also mean whether the hair feels smooth or rough.