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Significats de blastula en anglès

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Sphere of cells formed during early embryonic development in animals.

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        blàstula

        Blastodermic vesicle.

              Ús de blastula en anglès
              1
              E stage with thirty-two cells; F blastula; G gastrula in longitudinal section.
              The Evolution of Man — Volume 1
              2
              The round cavity, filled with fluid, inside the real blastula is the segmentation-cavity.
              The Evolution of Man — Volume 1
              3
              The latter (blastula) is palingenetic, and precedes the formation of the gastrula.
              The Evolution of Man — Volume 1
              4
              Also, in every case, the gastrula develops from the blastula by curving or invagination.
              The Evolution of Man — Volume 1
              5
              This real blastula only differs from that of the primitive ova in its chemical composition.
              The Evolution of Man — Volume 1
              6
              We call this layer the blastoderm, and the sphere itself the blastula, or embryonic vesicle.
              The Evolution of Man — Volume 2
              7
              A blastula, with wide embryonic cavity (blastocoel, bl), g incipient invagination.
              The Evolution of Man — Volume 1
              8
              Sagittal section of a hooded-embryo (depula) of triton (blastula at the commencement of gastrulation).
              The Evolution of Man — Volume 1
              9
              Longitudinal section of the blastula of a shark (Pristiurus) at the beginning of gastrulation.
              The Evolution of Man — Volume 1
              10
              Vertical section of the blastula of a hen (discoblastula).
              The Evolution of Man — Volume 1
              11
              Longitudinal section through the blastula of a shark (Pristiuris).
              The Evolution of Man — Volume 1
              12
              Formerly this real blastula was generally believed to be equivalent to the embryonic vesicle of the mammal.
              The Evolution of Man — Volume 1
              13
              Embryonic vesicle of triton (blastula), outer view, with the transverse fold of the primitive mouth (u).
              The Evolution of Man — Volume 1
              14
              From it is developed in the same manner in all the Placentals, by repeated cleavage, a multicellular blastula.
              The Evolution of Man — Volume 2
              15
              The frog-embryo now represents a modified embryonic vesicle or blastula, with hollow animal half and solid vegetal half.
              The Evolution of Man — Volume 1
              16
              This interesting blastula is very important.
              The Evolution of Man — Volume 2
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              Blastula a través del temps