Accession Number : AD0453490

Title :   THE CYTOLOGY OF THE DERMAL PAPILLA, THE BULB, AND THE ROOT SHEATHS OF THE MOUSE HAIR,

Corporate Author : TELE-DYNAMICS DIV AMERICAN BOSCH ARMA CORP PHILADELPHIA PA

Personal Author(s) : Roth,Sanford I. ; Helwig,Elson B.

Report Date : 30 DEC 1963

Pagination or Media Count : 19

Abstract : The ultrastructure of the dermal papilla, the hair bulb, and the root sheaths of the growing mouse hair are described. The dermal papilla contains a column of mesenchymal cells. Other mesenchymal cells surround the base of the papilla and send long processes up the side of the hair bulb from the dermal papilla. The cells of the external root sheath resemble basal cells, with which they are continuous above the sebaceous gland orifice, except that the lower cells do not have basal attachment devices. The filaments of the root sheaths arise from the desmosomes and extend into the cells. Trichohyalin is deposited upon the fibrils of the internal root sheath. This trichohyalin desappears along with most of the cell organelles at the point of transition of the internal root sheath cells, leaving only filaments without a visible intervening matrix, ribonucleoprotein particles, and pycnotic nuclei in the cells. (Author)

Descriptors :   (*HAIR, CYTOLOGY), MICE, HISTOLOGICAL TECHNIQUES, MICROSCOPY, ELECTRON MICROSCOPY

Distribution Statement : APPROVED FOR PUBLIC RELEASE