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Can I read Ameloblastic Secretion and Calcification of the Enamel Layer in Shark Teeth on EtoBox?
Ameloblastic Secretion and Calcification of the Enamel Layer in Shark Teeth by Norman E. Kemp is a Environmental Science article available to read on EtoBox.
What is Ameloblastic Secretion and Calcification of the Enamel Layer in Shark Teeth about?
Tooth primordia at early stages of mineralization in the sharks Negaprion brevirostris and Triaenodon obesus were examined electron microscopically for evidence of ameloblastic secretion and its relation to calcification of the enamel (enameloid) layer. Ameloblasts are polarized with most of the mitochondria and all of the Golgi dictyosomes localized in the infranuclear end of the cell toward the squamous outer cells of the enamel organ. Endoplasmic reticular membranes and ribosomes are also abundant in this region. Ameloblastic vesicles bud from the Golgi membranes and evidently move through perinuclear and supranuclear zones to accumulate at the apical end of the cell. The vesicles secrete their contents through the apical cell membrane in merocrine fashion and appear to contribute precursor material both for the basal lamina and the enameline matrix. The enamel layer consists of four zones: a juxta-laminar zone containing newly polymerized mineralizing fibrils (tubules); a pre-enamel zone of assembly of matrix constituents; palisadal zones of mineralizing fibrils (tubules); and interpalisadal zones containing granular amorphous matrix, fine unit fibrils, and giant cross-banded f
Who reads Ameloblastic Secretion and Calcification of the Enamel Layer in Shark Teeth?
It is typically read by researchers, students, and practitioners in Environmental Science.
- Author
- Norman E. Kemp
- Publisher
- John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0362-2525)
- Published
- 1985
- Language
- EN
- Field
- Environmental Science (Physical Sciences)