... saw-likeedge in the longitudinal section, for just as the tiles lie on the roof of a house, or the scales on the back of a fish, so the wholesurface of the hair is externally coatedwith a firmly adhering ... moisture,which is carried away to the surface by the glands shown (called sudoriparousglands), which, as is seen, passindependently off to the surface. Otherglands terminate under the skin in the hairfollicles, ... into cells, which, as the growthproceeds, are elongated into fibres, whichform the central portion of the hair. Just aswith the trunk of a tree, we have an outerdense portion, the bark, an...