荷斯坦犊牛右心室乳头肌及腱索的形态学观察

Morphologic Observation of Papillary Muscle and Tendious Cord in Right Ventricle of Holstein Calf

观察了20头新生荷斯坦犊牛右心室乳头肌和腱索的形态特征。右心室内有三个乳头肌,即壁乳头肌、隔前乳头肌、隔后乳头肌。三个乳头肌中壁乳头肌最大,隔前乳头肌最小。在三例标本中隔前乳头肌缺如。乳头肌分三个型,总计60例乳头肌中,游离型6例(10%),中间型24例(40%),附着型30例(50%)。腱索总数为17.93±3.34条。

The morphologic characters of papillary muscles anti tendious cord in fight ventricle were observated in 20 Holstein calves. There were three papillary muscles including the cranial wall papillary muscle, septal anterior papillary muscle and septal posterior papillary muscle. The cranial wall papillary muscle was the biggest and the septal anterior papillary muscle was the smallest among the three papillary muscles. The septal anterior papillary was absent in three calves. The papillary muscles were classified into three types.There were 6 cases of free type（ 10%） ,24 cases of intennecliate type（40%） and 30 cases of attached type （50%） in total 60 cases.The number of tendious cord were 17.93±3.34 rods.