The terminology of early development: History, concepts, and current usage

  title={The terminology of early development: History, concepts, and current usage},
  author={P. Collins and F. Billett},
  journal={Clinical Anatomy},
The meaning of some terms used in describing the development of embryos is discussed in the light of their historical origin and current usage. Attention is focused on the terminology associated with the early development of animals, particularly that concerned with gastrulation and germ layer theory. It is suggested that terms linked with outdated concepts are not always appropriate for, and unless defined with care may limit, our appreciation of the significance of subsequent observation and… Expand
Overview of the Development of the Human Brain and Spinal Cord
Fetal development of the brain can be studied in detail from about the beginning of the second half of pregnancy and molecular genetic data, that explain programming of development aetiologically, can now be incorporated. Expand
Incidence of congenital malformation in 2 major hospitals in Rivers state of Nigeria from 1990 to 2003.
The incidence of congenital abnormalities in 2 major hospitals in Port Harcourt, an oil-rich city in Rivers state, Nigeria, was documented from January 1990 to December 2003. Expand
Congenital malformations as seen in a secondary healthcare institution in Southeast Nigeria
Congenital malformations of the digestive system are the most prevalent in this study and were delivered by mothers aged 25-29 years and 40% by those of parities 4, 5. Expand


The differentiation of neural crest cells into visceral cartilages and odontoblasts in Amblystoma, and a re-examination of the germ-layer theory.
It is found that there is no invariable correlation between the germ layers and either the presumptive organ-forming regions or the formed structures, and the germ-layer theory in its classical form must be abandoned. Expand
Epigenetic Mechanisms In The Early Amphibian Embryo: Cell Differentiation And Morphogenetic Elements
Theory of cell differentiation, a mechanistic account of differentiation, and its applications in medicine and physiology are described. Expand
A Manual of the Anatomy of Invertebrated Animals
The work is one which, in proportion to its size, furnishes the student with the most compact account of the present aspect of the science of comparative anatomy in the English language. Expand
Regulation of development and differentiation by the extracellular matrix.
Some of the evidence that ECM components regulate differentiation and development are summarized, the regulatory mechanisms involved are described and the intracellular events that may transduce signals are discussed. Expand
XXII. On the anatomy and the affinities of the family of the medusæ
  • T. Huxley
  • Biology
  • Philosophical Transactions of the Royal Society of London
  • 1849
It is the intention to endeavour to supply the want of patience or ability on the part of the observers in the present paper, and to suggest a clue in unravelling many complexities, at first sight not very intelligible. Expand
La correspondance éventuelle des axes ovulaire and embryonnaire, l'inexistence of the concrescence, le manque de pertinence of the théorie cælomique, l’origine of the chorde, la valeur limitée of theorie de la gastraea, etc. Expand
Sex Differences in Morbidity and Mortality
  • A. Ciocco
  • Biology
  • The Quarterly Review of Biology
  • 1940
The conclusion which Goldschmidt reached is that "every individual is -able to develop into one sex or the other or any stage between" and that every individual contains all the elements necessary for the development of either sex and its attributes. Expand
The Triumph of Embryo
An axle assembly for use with a portable radial stacker. The assembly includes a transverse member which is secured to the end of the supporting structure of the stacker proximate the ground and theExpand