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Tranformations in the Facial Region of the Human Embryo: Advances in Anatomy, Embryology and Cell Biology, cartea 46/5

Autor C. Vermeij - Keers
en Limba Engleză Paperback – 16 feb 1973
The human face is invariably interesting, even as an object of embryologic analysis. The early embryonic growth processes are located around the developing sense organs, among which the nose holds a key position. The first indication of the development of the nose is the formation of the placodes, oval areas of thick­ ened and condensed ectoderm, one on each side of the head. Each of these placodes is transformed, via the nasal groove, into the nasal tube, sometimes indicated as primitive nasal cavity. In the literature this transformation has been described as an isolated process that changes the superficial facial region. Some authors, including Wolgensinger (1950), think that the active component of this trans­ formation primarily is the ectoderm of the nasal placode. Others, i. e. Hochstetter (1891), Kallius (1905) and Vermeij-Keers (1967), assume this component be located in the mesenchyme. Peter (1913, 1949), Patten (1953, 1961), Warbrick (1960), and Andersen and Matthiessen (1967) hold both these components to be active. In the first and last of these three concepts the ectoderm of the nasal placode and the nasal groove respectively, is thought to invade the mesenchyme in the posterior direction. Invading ectoderm has also been considered to form - independent of the transformation - the organ of Jacobson and the naso­ lacrimal duct and to separate the conchae (e. g. Born, 1876; Legal, 1883; Kallius, 1905; Peter, 1913, 1949; Streeter, 1948; Andersen and Matthiessen, 1967).
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Specificații

ISBN-13: 9783540060888
ISBN-10: 354006088X
Pagini: 32
Ilustrații: 32 p.
Dimensiuni: 155 x 235 x 2 mm
Greutate: 0.06 kg
Ediția:1972
Editura: Springer Berlin, Heidelberg
Colecția Springer
Seria Advances in Anatomy, Embryology and Cell Biology

Locul publicării:Berlin, Heidelberg, Germany

Public țintă

Research

Cuprins

Material and Methods.- Microscopic Observations.- Early Stages (4.4 to 10 mm C-RL).- 11 mm C-RL Stage.- 12 mm C-RL Stage.- 14 to 17 mm C-RL Stages.- Discussion and Conclusions.- Summary.- References.