| 单词 | gill sac |
| 释义 | > as lemmasgill sac gill sac n. a sac or cavity formed by or enclosing a gill; esp. = gill pouch n. 1. ΚΠ 1827 R. T. Gore tr. C. G. Carus Introd. Compar. Anat. Animals II. 146 Even in a very small individual [ascidian] I found the Gill-sac occupied by a punger (Cancer pagurus) scarcely less than half its own size. 1843 R. Hamilton Nat. Hist. Brit. Fishes (Naturalist's Libr.: Ichthyol. IV) I. 285 In a state of repose, and when the fish does not inflate its throat or gill-sacs, the head is two-fifths the length of the body, and is somewhat broader. 1979 E. J. W. Barrington in M. H. Wake Hyman's Compar. Vertebr. Anat. (ed. 3) iii. 59 The gill slits do not open directly to the outside in most enteropneusts; instead, each leads into a pouch, the gill sac, that opens externally by the gill pore. 2008 Q. Bone & R. H. Moore Biol. Fishes (ed. 3) v. 129 (caption) Horizontal section of right gill sacs in Myxine..showing..common outflow. < as lemmas |
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