摘要
对110个3-6岁高原藏系绵羊新鲜心脏右心内乳头肌进行了观察。结果如下:①82例右心内乳头肌有三群,位于室中隔上的隔前乳头肌群、隔后乳头肌群和位于侧壁上的侧壁乳头肌群。28例右心内仅有两群乳头肌,即隔后乳头肌和侧壁乳头肌。②乳头肌可分为大小两种,各群中均以大乳头肌为主。隔前乳头肌群中大乳头肌仅有一个,28例的大乳头肌附近有小乳头肌。隔后乳头肌群中有1-4个大乳头肌,37例的大乳头肌附近有小乳头肌。侧壁乳头肌群中有1-2个大乳头肌,仅2例大乳头肌附近见有小乳头肌。大乳头肌分附着型、游离型和中间型。隔前乳头肌群中的大乳头肌均为附着型,隔后乳头肌群中三种类型均存在,侧壁乳头肌有游离型秈中间型两种。本文还对乳头肌的形态、腱索的连结方式等进行了描述。
Abstract The papillary muscles and chordae tendineae of the right ventricle were observed in 110 fresh hearts of Tibetan-sheep in age ranged from 3-6 years. The results were as follows: ①There are three groups of papillary muscles in right ventricle of 82 Tibetan-sheep, of which two were named the septal anterior and the septal posterior papillary muscle on the septum respectively, and the third group of papillary muscle is named the cranial wall papillary muscle on the cranial wall but the septal anterior papillary muscle is absent in 28 cases. ②The papillary muscle may be classified into the large and the small types. and the former is the main type. ③The large papillary may be classified into three types, the tethered, free and intermediate type. The large papillary muscles on the septal anterior wall all are tethered type. There are tethered (32.1%), free(36.5%)and the intermediate type(31.4%)among the septal posterior papillary mm. and intermediate (4.5%) and free type(95.5%) among the cranial wall papillary mm. In addition, the shape of papillary and the connectal manner of chordae tendineae is also described in the paper.
关键词
藏系
右心室
乳头肌
形态学
绵羊
: Morphology
Papillary muscle
Tibetan-sheep
