| 单词 |
procuticle |
| 释义 |
procuticle|prəʊˈkjuːtɪk(ə)l|
[f. pro-2 + cuticle.]
The inner, thicker layer of the cuticle of an arthropod, situated below the epicuticle and comprising the exocuticle (if present) and the endocuticle.
1951A. G. Richards Integument of Arthropods xvi. 148 The term procuticle is proposed for the embryologically original (parent) chitin-protein fraction. Ibid. 149 The procuticle may remain seemingly unchanged in soft transparent cuticle and soft areas.., in which case the fully formed cuticle is said to consist of epicuticle and endocuticle... Or the outer portion of the procuticle may become hardened and darkened by sclerotization, giving an outer dark exocuticle and an inner transparent endocuticle. 1959W. Andrew Textbk. Compar. Histol. iii. 91 It [sc. the cuticle of arthropods] presents a great diversity of structure but in general may be divided into an outer part without chitin, the ‘epicuticle’, and an inner part with chitin, the ‘procuticle’ or ‘endocuticle’. 1962Gordon & Lavoipierre Entomol. ix. 53 The procuticle confers on the integument amongst other properties those of hardness and strength and is the real skeletal support of the body of the insect. 1967[see exocuticle a]. 1976C. P. Friedlander Biol. Insects i. 16 When first secreted the entire procuticle is in the endocuticle condition; subsequently a large proportion of it is hardened..to form the exocuticle. |
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