Lim K O, Boughner D R
Arch Pathol Lab Med. 1977 May;101(5):236-8.
Scanning electron microscopy was used to examine the surface and internal structure of adult human mitral valve chordae tendineae. The endocardial cell surface of the tissue was found to be relatively smooth and even. Just beneath the endocardial surface, widely spaced collagen fibers were found. These were observed to be aligned at an angle to the chordal long axis and to wrap themselves around the central collagen core. The chordal core consisted of relatively straight collagen fibers that were arranged with their axis parallel to the long axis of the chordae. At the microstructural level, these collagen fibers were observed to consist of a network of collagen fibrils. This architectural arrangement is an advantageous feature for a tissue that is under constant dynamic stress. The scanning observations were confirmed by transmission electron microscopy.
采用扫描电子显微镜检查成人二尖瓣腱索的表面和内部结构。发现该组织的心内膜细胞表面相对光滑平整。在心内膜表面下方，发现了间距较宽的胶原纤维。观察到这些纤维与腱索长轴呈一定角度排列，并围绕中央胶原核心缠绕。腱索核心由相对较直的胶原纤维组成，其轴与腱索的长轴平行。在微观结构层面，观察到这些胶原纤维由胶原原纤维网络组成。这种结构排列对于处于持续动态应力下的组织来说是一个有利特征。扫描观察结果通过透射电子显微镜得到了证实。
