| 单词 | ambulacral |
| 例句 | Of or pertaining to ambulacra; avenuelike; as, the ambulacral ossicles, plates, spines, and suckers of echinoderms. Webster's Unabridged Dictionary 2012-03-24T02:00:23.513Z Young Idyia in which the ambulacral tubes begin to ramify; magnified, letters as before. Seaside Studies in Natural History Marine Animals of Massachusetts Bay. Radiates. 2011-03-07T03:00:13.343Z Its color was a pale blue and the ambulacral suckers were clearly discernible on all five rays. Astounding Stories, August, 1931 The left-hand figure shows one of the "ambulacral areas" enlarged, exhibiting the perforated plates. The Ancient Life History of the Earth A Comprehensive Outline of the Principles and Leading Facts of Palæontological Science On the contrary, in the Star-fishes the ambulacral rows are protected on either side by a row of the so-called interambulacral plates, through which no suckers pass. Seaside Studies in Natural History Marine Animals of Massachusetts Bay. Radiates. 2011-03-07T03:00:13.343Z All Echinoderms without exception have ambulacral tubes, even though in some there are no external ambulacral suckers connected with them. Seaside Studies in Natural History Marine Animals of Massachusetts Bay. Radiates. 2011-03-07T03:00:13.343Z These suckers are called the ambulacra, the lines along which they run are called the ambulacral rows or zones, while the system of locomotion as a whole is known as the ambulacral system. Seaside Studies in Natural History Marine Animals of Massachusetts Bay. Radiates. 2011-03-07T03:00:13.343Z The tube, connecting with the central tube around the mouth, by means of which it communicates with the ambulacral tubes, is very short. Seaside Studies in Natural History Marine Animals of Massachusetts Bay. Radiates. 2011-03-07T03:00:13.343Z Although the ambulacral suckers are, as we have said, equally developed on all the tubes, yet the Pentacta does not use them indiscriminately as locomotive organs. Seaside Studies in Natural History Marine Animals of Massachusetts Bay. Radiates. 2011-03-07T03:00:13.343Z The mouth, which is surrounded by a circular tube, is not furnished with teeth, as in the Sea-urchin; but the end of each ambulacral ridge is hard, thus serving the purpose of teeth. Seaside Studies in Natural History Marine Animals of Massachusetts Bay. Radiates. 2011-03-07T03:00:13.343Z Half a young Sea-urchin immediately after resorption of the larva;s'' s'' spines, t' t' ambulacral tentacles. Seaside Studies in Natural History Marine Animals of Massachusetts Bay. Radiates. 2011-03-07T03:00:13.343Z |
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