| 释义 |
epicardium|ɛpɪˈkɑːdɪəm|
Pl. -ia.
[f. epi-, after pericardium.]
1. Anat. The innermost layer of the pericardium, closely investing the heart.
1865in Dunglison Dict. Med. Sci. (rev. ed.). 1894D. J. Cunningham Man. Pract. Anat. II. i. 35 The investing part [of the pericardium] which covers the heart is called the visceral part or the epicardium. 1962Gray's Anat. (ed. 33) 730 The visceral portion, or epicardium, covers the heart and the great vessels, and from the latter it is reflected to form the parietal layer, which lines the fibrous pericardium.
2. Zool. In certain ascidians, each of two hollow outgrowths from the pharynx, connected with the process of budding.
1893Q. Jrnl. Microsc. Sci. XXXV. 125 The perivisceral cavity of Ciona corresponds to the epicardium of Clavellina. 1914E. W. MacBride Text-bk. Embryol. I. xvii. 626 The conjoined inner walls of the epicardia form a kind of visceral peritoneum, enwrapping heart, pericardium, and intestine. 1929Q. Jrnl. Microsc. Sci. LXXII. 158 Pharynx produced behind the endostyle into a pair of diverticula (‘epicardia’). 1950J. Z. Young Life of Vertebrates iii. 62 The situation is complicated by the presence of a pair of outpushings from the pharynx, the epicardia, or perivisceral sacs.
Hence epiˈcardiac, epiˈcardial adjs.
1893Q. Jrnl. Microsc. Sci. XXXV. 123 Two tubes are first formed as outgrowths of the pharynx [in Clavellina], called by van Beneden and Julin [1887] the ‘epicardiac tubes’. 1908Practitioner Nov. 638 In the first group of cases there is simple adhesion between the peri- and epicardial layers. 1911Encycl. Brit. XXVII. 390/1 There are..two main types of budding [in compound Ascidians]... There is first the ‘stolonial’ or ‘epicardiac’ type. 1914E. W. MacBride Text-bk. Embryol. I. xvii. 626 The epicardial tubes or epicardia. 1962Lancet 29 Dec. 1373/1 The infection was cured without removing the electrode, which was left in the ventricle until the insertion of epicardial wires 10 days later. |