Studies on the Follicle Bulb of Fibres I. Mitotio and Cellular Segmentation in the Wool Follicle With Reference to Ortho·and Parasegmentation

Abstract

IThere is a gradient in the density of cells in mitosis which decreases in a proximodistal direction. Mitotic activity ends at a height one cell layer above the apex of the papilla. The decreasing mitotio density gradient commences at a level, in all bulbs, coincident with the proximal limit of differentiation of Henle's layer of the inner root sheath.