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单词 perihaemal
释义

> as lemmas

perihaemal
perihaemal adj.
Brit. /ˌpɛrɪˈhiːml/
,
U.S. /ˌpɛrəˈhim(ə)l/
(also perihemal) [after German perihämal (H. Ludwig 1877, in Zeitschr. f. wissensch. Zool. 30 123)] designating a system of circular and radial channels and cavities in echinoderms and certain other invertebrates.
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perihaemal1881
1881 Q. Jrnl. Microsc. Sci. 31 171 The space..between the water-vessel above and the ambulacral epithelium below..was named by Ludwig the ‘perihæmal canal’. It had been previously called the nerve-vessel or nerve-canal.
1962 D. Nichols Echinoderms ii. 27 Perihaemal system. As its name suggests, this system normally surrounds the haemal complex, though some recent authors prefer to call it the hyponeural sinus system.
1995 Biol. Bull. 188 98/1 As perihemal fluid moves towards the stone canal, it passes by or through the axial organ.
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