单词	blastopore
释义	blastopore /ˈblastəˌpôr / noun The opening of the central cavity of an embryo in the early stage of development.Both the fate of the blastopore and early embryonic cleavage patterns vary considerably among the Bilateria and have not been assessed experimentally in many species.... In the complementary category of the protostomes, which includes annelids and arthropods, the blastopore develops into the mouth. One group, including amphioxus, lampreys, sturgeons and amphibians, displays the primitive condition, with holoblastic eggs and involution of the endoderm through a blastopore.
随便看	miogeoclinal miogeocline miogeosynclinal miogeosyncline Miohippus Miolithic miomba miombo mionite miosis miospore miotic MIP mipafox mi-parti miparti Mipolam MIPS Miquelet lock Mir Mira miraa mira'a Mirabeau, Comte de mirabelle

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