SCANNING ELECTRON MICROSCOPIC OBSERVATION ON THE MICROVESSELS IN THE HUMAN SINOATRIAL NODE AND ATRIOVENTRICULAR NODE
- VernacularTitle:人窦房结和房室结微血管的扫描电镜观察
- Author:
Xifang AN
;
Guiqin YUAN
;
Rui LIAO
- Publication Type:Journal Article
- Keywords:
Sinuatrial node;
Atrioventricular node;
Vascular cast;
Scanning electron microscope;
Human
- From:
Acta Anatomica Sinica
1954;0(02):-
- CountryChina
- Language:Chinese
-
Abstract:
Four fresh corpses of infant are used in this research. Three-dimensional microvasculatures of the sinoatrial node and atrioventricular node were studied by means of the observation of vascular casts with SEM. The results showed that the vascular bed of the sinoatrial node was consisted of the microvascular networks. It was oval in shape. The central artery penetrated this node, through its longitudinal axis and divided progressively into arterioles and precapillary arterioles and finally, they branched into capillary networks at the superficial part of the node. The postcapillary venules were characterized by draining blood in accordance with area. The microvascular construction of atrioventricular node was an oblate microvascular network in shape. There was a layer of delicate capillary networks at its superficial part. In the depth of the capillary networks, the venous plexus which was thick and sinusoidal in shape was observed through the meshes. The artery of atrioventricular node entered the node from one side of it. In the node, the artery ramified by degrees to periphery into precapillary arterioles, which penetrated venous plexus and connected with capillary networks in the superficial part of the node. There were evidently narrow rings, whick were impression of the muscle sphincters at the origin of thep ostcapillary venules.
