Figure 2

(a) Part of an intra-orally transferred skin flap includes two "widely separate"' groups of "shrunk" pilosebaceous units. The randomly arranged collagen bundles (asterisk) of the reticular dermis are seen between the groups. Sweat glands are not present here. (b)The pilosebaceous group in the right of Fig. 2a comprises sebaceous glands (arrowhead), arrector pili muscle (P) and hair follicles (arrows) cross-sectioned through their upper (left) or lower (right) segments. Despite the "wide separation" and "shrunk" appearance, the preservation of lower segment suggests that the follicles have not entered the involutionary catagenous stage that would be expected during "mucosalisation".