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...d more ventrally, the younger nearer the body of the embryo, in very early stages they can be shown to be concerned in the formation of the vessels in the be | Frassi, NT. 1 1

...er by West describes an embryo at 25 somite stage, would be similar to a [[Carnegie stage 12]] (26 - 30 days), caudal neuropore closes, Somite Number 21-29. {{Carnegie stage 12 links}}

...follicles undergo atresia, which may occur when they are small or at later stages even when they irc almost fully developed IMien a follicle becomes atretic, ...ome mammals there is an increase in the number of luteal cells m the early stages of formation of the gland due in part at least to mitotic division of young

...a single cell in thickness. In all of the embryos in the collection of the Carnegie Institution of Washington, ranging from 15 to 20 mm., crown-rump measuremen ...oglobin-containing fragments. Embryo 74 contains cells which show the last stages of erythrocyte digestion (fig. 28). Here the macrophages contain a few gran

A rabbits potential for reproduction is high, breeding from the early stages of 3 to 4 months of age. A mature female rabbit can be pregnant from 6 to 8 The following timelines show a comparison of the developmental stages between human and rabbit embryos. They have been adapted from Derelanko (20

...., 1936. A Laboratory Atlas of the 13-mm. Pig Embryo. (Prefaced by younger stages of the chick embryo.) The Wistar Institute Press, Philadelphia, iv & 104 pp ...2. Lehrbuch der Anatomic der Haustiere. chickhard & Ebner, Stuttgart. (Bd. 1, Allgemeine und vergleichende Anatomic mit Entwicklungsgeschichte, xii & 81

...have in their possession an extensive collection of pregnant uteri at all stages of gestation from about the 11th day after fertilization to full term. Seri ...points relating to the structure and function of the human placenta at all stages of its development.

...helium excluding the rudimentary villi). Amniotic vesicle 0.17 x 0.143 x 0.1 mm. Entodermic vesicle 0-127 x 0-11 mm. Embryonic plate 0.065 x 0.045 mm. A (2) Presomite embryo (B), (Frazer). Ovum 2.2 x 2.1 X 1.7 mm. Yolk sac 0.225 x 0.190 mm. Embryonic plate 0-323 mm. Age about 19 day

...described by H. Peters in 1899. A number of human embryos in various early stages after the formation of the medullary canal and up to the stage with four ao ==The Classification of the Early Stages==

...Surgery of the Johns Hopkins University, and the Department of Embryology, Carnegie Institution of Washington. ...ages of development of the metanephros, the anlage and early developmental stages of the renal evagination and nephrogenic tissue, and the later development

...ryngeal recess. This paper uses embryos form Huber's collection and from [[Carnegie Collection]]: {{CE221}}, {{CE371}}, {{CE389}}, {{CE406}} ...adult as identical with the Seessel's pocket described for early embryonic stages. A number of observers have called attention to the fact that there exists

...University of Chicago collection that were eventually contributed to the [[Carnegie Collection]]. ...would approximately between [[Carnegie stage 11]] (13 - 20 somites) and [[Carnegie stage 12]] (21 - 29 somites).

* '''Maternal thyroid hormone''' - required for early stages of brain development ([[#Maternal Thyroid|Maternal Thyroid]] recent studies ...ice. Sox9, a key factor in branching organ development, distinguishes Nkx2-1+ cells in the thyroid bud from the progenitors that originally form the thy

:'''Links:''' [[Book_-_Contributions_to_Embryology|Carnegie Institution of Washington - Contributions to Embryology]] ...ight of Dolley's (1910, p. 333) work, they would seem to be in the initial stages of fatigue, as evidenced by the increase in the amount of Nissl substance i

...pg|90px|left]] This historic 1931 paper describes an early human embryo, [[Carnegie stage 8]]. ...erature by such embryos as K113 (GROSSER, 1913), Wa17 (GROSSER, 1931), Peh.1- Hochstetter (ROSSENBECK, 1923), and the embryo of INGALLS (1918), and char

C. M. GOSS 1')€per'tmen.t of A.-nrnfomy, College of Pk-jj8fC’t-(.!»'nS and S-irrgeo ...ss (’35). The medium which gave the most fayorable results was composed of 1 part chicken plasma and 4 parts extract of newborn rat hearts in a buffered

...he naso-pharynx. In the development of the human embryo we see these three stages reproduced.<ref> See Professor J. E. Frazer, Lancet, 1916, vol. 2, p. 45 ; ...Anat. Hefte, 1912, vol. 45, p. 471 (Premaxilla in Man); 1912, vol. 46, p. 1 (Dev. of Palate, Mammals) ; E. Gaupp, Anat. Hefte, 1910, vol. 42, p. 311 (E

Appearance of tendons begins in the 20th Carnegie stage and marks the beginning of fibrillogenesis. This process is initiated ...renatal development, though few studies existed which focused on the fetal stages. During the 70's a majority of research in the field focused on the histolo

...cording to Born's wax-plate method, of the hind-brain of all the different stages herein described. In many instances it was considered advisable to make two ...ime when the mother was destroyed. An examination of Keibel's Normentufel (1) shows that coition and fertilisation of the ovum are not by any means cont

:(More? [[ Week 1]] | [[Chicken Development]] | [[Frog Development]]) ...m and undergone one or more divisions. Also the set of early developmental stages in which a plant or animal differs from its mature form. See also [[H#human