| 释义 |
X organ Zool.
Also x organ and with hyphen.
[After G. organ X, X-organ (B. Hanström 1931, in Zeitschr. f. Morphol. u. Ökol. d. Tiere XXIII. 200, 202), so called because indicated by the letter X in a diagram published by G. Bellonci 1882, in Mem. dell' Accad. Sci. dell' Ist. di Bologna III. 419 ff.]
A group of neurosecretory cells in the eye-stalk of some crustaceans, one of the secretions of which inhibits the production of moulting hormone by the Y organ.
1938[see sinus gland s.v. sinus 6]. 1959W. Andrew Textbk. Compar. Histol. xiii. 513 There is a definite pathway..by which the axons of the nerve cells of the x-organ travel to the sinus gland. 1975Sci. Amer. Feb. 74/1 The eyes of crabs are mounted on movable stalks. The stalks also house a neuroendocrine unit called the X-organ sinus-gland complex, which secretes a hormone that causes the pigments to disperse within the chromatophores. |