chaeta
enUKchae·ta
C0223200 (kē′tə)chaeta
(ˈkiːtə)chae•ta
(ˈki tə)n., pl. -tae (-tē).
| Noun | 1. | chaeta - a stiff chitinous seta or bristle especially of an annelid worm |
| 单词 | chaeta | |||
| 释义 | chaetaenUKchae·taC0223200 (kē′tə)chaeta(ˈkiːtə)chae•ta(ˈki tə)n., pl. -tae (-tē).
ChaetaenUKchaeta[′kēd·ə]Chaetaone of numerous movable hairlike pectinate or hooked protuberances of the cuticle in invertebrates. Chaetae have many purposes. In some invertebrates they help support the body during digging (Echiuroidae, many annelid worms, Pogonophora) or crawling (annelid worms). In other invertebrates it serves a protective function (certain polychaetes and brachiopods), and in still others it is used in capturing prey (chaetognaths). In polychaetes, the chaetae are part of the primitive extremities—parapodia. Each chaeta consists of a single cell on the floor of a cutaneous invagination. The chaetae of arthropods are hairlike or feathery protuberances of the chitinous cuticle; they are sense organs (mainly of touch) and sometimes help protect the body, especially the wings, from excessive wetness. Some ticks and mites still preserve primitive metamerism in the arrangement of their chaetae. chaetaenUKse·ta, pl.set·ae(sē'tă, -tē),chaeta(kē′tə)chaetaorsetaa bristle-like structure, often chitinous (see CHITIN). The structures are found particularly in ANNELID worms, where they occur as projections on most segments, and serve as anchors for that segment during locomotion.chaetaenUK
Words related to chaeta
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