单词	protostome
释义	protostome /ˈprəʊtə(ʊ)stəʊm / noun Zoology A multicellular organism whose mouth develops from a primary embryonic opening, such as an annelid, mollusc, or arthropod.These animals are all protostomes - the mouth develops before the anus in the young embryo - and they have long been recognized as belonging together as a group.... In the complementary category, the protostomes, which includes annelids and arthropods, the blastopore develops into the mouth. Arthropods are bilaterally symmetrical protostomes with strongly segmented bodies. Origin 1950s: from proto- 'primitive' + Greek stoma 'mouth'.
随便看	myofilament myofunctional myogen myogenesis myogenic myoglobin myoglobinuria myoglobulin myogram myograph myographic myography myohaematin myohaemoglobin myoid myo-inositol myointimal myokinase myokymia myolipoma myologic myological myologically myologist myology

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