The American journal of anatomy . ed; V, blood vessel. 30 Portion of wall of yolk-sac of 10 mm. pig embryo showing the differenti-ation of a haemoblast {h) from the mesenchyma. The nucleus of the definitivehaemoblast is still connected through a chromatic nuclear strand with the nucleusof its sister mesenchymal cell. E, entoderm, schematically represented; 1,blood vessel; mes., mesothelium. 31 Four adjacent entodermal cells to show especially the basal or presecre-tion filaments. 32 A group of four adjaccul liver cells from the same cmbiyo, to show the(dose siriiiiaiity in luiclcar and cvtoi)l
The American journal of anatomy . ed; V, blood vessel. 30 Portion of wall of yolk-sac of 10 mm. pig embryo showing the differenti-ation of a haemoblast {h) from the mesenchyma. The nucleus of the definitivehaemoblast is still connected through a chromatic nuclear strand with the nucleusof its sister mesenchymal cell. E, entoderm, schematically represented; 1,blood vessel; mes., mesothelium. 31 Four adjacent entodermal cells to show especially the basal or presecre-tion filaments. 32 A group of four adjaccul liver cells from the same cmbiyo, to show the(dose siriiiiaiity in luiclcar and cvtoi)lasmic struclurc and form between thehepatic and yolk-sac cnnbryonic ei)ithelium. INIany of the hejiatic cells (nothere represented) show mitotic figures; amitotic divisions apparently do notyet occur. 33, 34 and 35 Various ty])es of giant haemoblasts. Figure 35 is typical of alarge srroui) of giant cells whose nuclei ])roliferatc amitotically. 302 ERYTIIliOTOIESrS IN YOLK-SAC OF PIG ) il. E. JORDAN PLATK 1^ h E 13 14 15 16. »^. 21 9 22 S20 ^
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Keywords: ., bookauthorwi, bookcentury1900, bookdecade1910, booksubjectanatomy
