. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 18 Structure of Wall. — The Entoderm. The wall consists of three layers: entoderm, mesenchyme, and mesothelium (coelomic epithelium). The thickness of the wall varies considerably for different regions. The wall is thicliest at the distal pole and considerably thicker over one half of the surface. The Meso- thelium. Opening of Tubule into Cavity Tubule Blood Vessel Fig. 3. Photomicrograph of a section through the wall of the umbilical vesicle of a mm human embryo, showing an entodermal tubule opening into the cavity of th
. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 18 Structure of Wall. — The Entoderm. The wall consists of three layers: entoderm, mesenchyme, and mesothelium (coelomic epithelium). The thickness of the wall varies considerably for different regions. The wall is thicliest at the distal pole and considerably thicker over one half of the surface. The Meso- thelium. Opening of Tubule into Cavity Tubule Blood Vessel Fig. 3. Photomicrograph of a section through the wall of the umbilical vesicle of a mm human embryo, showing an entodermal tubule opening into the cavity of the vesicle. The epithelium lining the tubule is continuous with that lining the vesicle. The entodermal cells of the tubule have a vacuolated cytoplasm and contain proximally large mucinous masses (ergastoplasm, Braxca) and distally various cell-inclusions (secretory granules, Branca). In the lower portion of the section is shown a tubule lined with flattened cells. This is the more usual character of the epithelium lining the tubules of the vesicle of the 13 mm embryo. The tubules are filled with an amorphous coagulum. Magnified 640 diam. Reduced ^/^ in reproduction. Made by Dr. Leopold Jaches, Cornell University Medical College, New York Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Anatomische Gesellschaft. Jena : G. Fischer
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherjenag, bookyear1910
