| 释义 |
symplasma Med.|sɪmˈplæzmə|
Pl. -plasmata.
[mod.L., coined in Ger. (R. Bonnet 1903, in Monatsschr. f. Geburtshülfe u. Gynaekol. XVIII. 8): see sym- and plasma.]
A mass of cell nuclei and cytoplasm regarded as formed by the breaking down of the cell walls of the outer layer of the placenta.
1908Q. Jrnl. Microsc. Sci. LIII. 134 The maternal tissue..is universally recognised to undergo catalytic changes, and to pass into a symplasma, towards the composition of which superficial epithelium, proliferated epithelium of crypts and glands, subepithelial connective tissue, leucocytes, and blood have all largely contributed. 1910F. H. A. Marshall Physiol. of Reproduction x. 414 After the destruction of the epithelium, the villi penetrate into the deeper tissues of the mucosa by gradually absorbing the symplasmata, and branch to form secondary and tertiary villi. 1923Q. Jrnl. Microsc. Sci. LXVII. 146 A degenerating syncytium is called a symplasma.., a term which can be correctly applied only to maternal structures of a degenerate nature contained in the plasmodium. 1973Boving & Larsen in Hafez & Evans Human Reproduction vii. 149/1 By this stage, the rabbit uterine epithelium has become converted into a ‘symplasma’ or multinucleated syncytium through the disappearance of the cell membranes between the epithelial cells. |