B 



Plate 6 



A. The convoluted cell contacts in rat skin at high resolution to show the 

 multiple layers L deposited between the dense cell membranes or 

 desmosomes. 



B. A further example of a complex membrane development in the 

 hardened cells of the Henle layer of the human hair. Between the dense 

 plasma membranes M is a single dense layer L. At T are to be seen 

 sections of two " ball and socket " joints formed by tongues of one cell 

 penetrating into the neighbouring cell. 



