AN ULTRASTRUCTURAL STUDY OF THE DIFFERENTIATION AND DEVELOPMENT OF ATRIAL MUSCLE CELLS OF RAT EMBRYOS
- VernacularTitle:大鼠胚心房肌细胞分化发育的超微结构研究
- Author:
Zhongsheng JI
;
Zhaote LI
- Publication Type:Journal Article
- Keywords:
Atrial specific granules;
Atrial muscle cells;
Differentiation and development;
Electron microscopy;
Rat embryos
- From:
Acta Anatomica Sinica
1953;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
The development and differentiation of myocardial cells in the atria of rat embryos from 11 to 19 days and neonates were studied by electron microscopy, particularly with reference to the occurrence and distribution of atrial specific granules in muscle cells. The results were as follows:Atrial specific granules were invisible in muscle cells of 11 days embryos and occurred only in a few muscle cells in 12 days embryos. Since then their size and number in muscle cells increased with development. The granules persisted during mitosis.In atria of embryos from the 12th day on two kinds of myocardial cells could be distinguished, the one containing specific granules and the other without. The former showed well developed Golgi complex and abundant rough endoplasmic reticulum. As development proceeds both types of cells showed increasing amount of myofilaments and mitochondria in their cytoplasm and following the same trend approaching maturity.
