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metazoa

n. 后生动物

後生动物

WordNet (r) 3.0 (2006) (WordNet)

Metazoa
n 1: multicellular animals having cells differentiated into
tissues and organs and usually a digestive cavity and
nervous system [synonym: {Metazoa}, {subkingdom Metazoa}]

The Collaborative International Dictionary of English v.0.48 (gcide)

Metazoa \Met`a*zo"a\, n. pl. [NL., fr. Gr. ? after zo^,on an
animal.] (Zool.)
Those animals in which the protoplasmic mass, constituting
the egg, is converted into a multitude of cells, which are
metamorphosed into the tissues of the body. A central cavity
is commonly developed, and the cells around it are at first
arranged in two layers, -- the ectoderm and endoderm. The
group comprises nearly all animals except the Protozoa.
[1913 Webster]

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英文字典中文字典相关资料:

Metazooa
The animal kingdom (Metazoa, in Greek) is full of our distant relatives some more distant than others! Metazooa is a game that tests how well you know our extended family tree
Metazoa: The Animal Encyclopedia - ThoughtCo
Animals (Metazoa) are a group of living organisms that includes more than one million identified species and many millions more that have yet to be named Scientists estimate that the number of all animal species is between 3 and 30 million species
Metazoa | animal | Britannica
…origin of multicellular animals (metazoans) was long dominated by German embryologist Ernst Haeckel’s theory that the original metazoan ancestor was a spherical protozoan that was structurally similar to the cnidarians (e g , jellyfish and corals) Currently there are two alternative explanations The first traces metazoans back to
Introduction to the Metazoa - University of California Museum of . . .
Our exhibits on animals will help you make sense of the complex and beautiful story of their history For each group of organisms (each taxon), we present information on the group's fossil record, life history, ecology, systematics and morphology
What Is a Metazoan? Definition Characteristics
Metazoans are categorized into numerous phyla, each with distinct characteristics Sponges (phylum Porifera) are among the simplest metazoans, lacking true tissues and organs They are composed of aggregations of cells and filter food particles from water
METAZOA Definition Meaning | Merriam-Webster Medical
The meaning of METAZOA is a major taxonomic group comprising the metazoans
The origin of Metazoa: a unicellular perspective - Nature
Here, we review the results of these investigations and discuss their implications for understanding the earliest stages of animal evolution, including the origin of metazoan genes and genome
Phylogeny of Metazoa | Springer Nature Link
Since the animals (Metazoa) can be traced back to one last common ancestor, studying their evolutionary history or phylogeny is one key to breaking down this diversity
Metazoa (animals) - biodiversity explorer
Spiny-headed parasitic worms; about 1150 species known

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