File:Kollmann062.jpg

Fig. 62.

Fig. 62 Curvature of cotyledons A.mnioten one embryo. Kriiiiosaeschichte. 59 and67), also causes a change in course in it out of Cölomspalte. It runs just no longer(as in Fig 61), but likewise curved (Figs. 62 and 63). She is already showing somesimilarity with the later pleuroperitoneal cavity to which it transforms itself. At thiscoelom, two divisions are distinguished: 1 The embryonic coelom, which is locatedinside the cylindrical body (Figs. 61 and 63). It will later form the pleuro-peritoneal cavity. Second The aussererabryonale coelom between the leaves of the blastoderm but laterally from the actual embryo (Fig. 63). Both Parietalzoneürsegmenl Embryonic stem zone coelom

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Images from - Atlas of the Development of Man (Volume 1)

(Handatlas der entwicklungsgeschichte des menschen)

Kollmann Atlas 1: Predevelopment | Ontogeny | Fetal membranes | Body shape | Systems and organs | Kollmann Atlas 1 | Kollmann Atlas 2 | Julius Kollmann

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Fig. 62. Krümmung der Keimblätter eines A.mnioten-Embryo. Kriiiiosaeschichte. 59 und 67), ruft auch eine Änderung in drin Verlauf der Cölomspalte hervor. Sie verläuft nicht mehr eben (wie in Fig. 61), sondern eben- falls gekrümmt (Figg. 62 und 63). Sie zeigt schon jetzt einige Ähnlich- keit mit der späteren Pleuroperitonealhöhle , zu der sie sich umbildet. An diesem Cölom müssen zwei Abteilungen unterschieden werden: 1. Das embryonale Cölom, das innerhalb des cylindrischen Körpers sich befindet (Figg. 61 und 63). Es bildet später die Pleuro- peritonealhöhle. 2. Das aussererabryonale Cölom zwischen den Blättern der Keimhaut aber lateral von der eigentlichen Embryonalanlage (Fig. 63). Beide Parietalzone ürsegmenl Stammzone Embryonales Cölom