初生荷斯坦犊牛左心室乳头肌及肌腱的形态学观察

Morphologic Observation of Papillary Muscle and Chordae Tendiness of Leftventricle in Newly born Holstein Calves

观察了20头新生荷斯坦犊牛左心室乳头肌和腱索的形态特征。左心室内有二个乳头肌,即壁前乳头肌,壁后乳头肌。壁前乳头肌大于壁后乳头肌。乳头肌分三个型,总计40个乳头肌中,附着型35个(87.5%),中间型5个(12.5%),无游离型乳头肌。腱索平均为13.00±1.30条。

Papillary muscle and chordae tendiness of leftventricle in twenty newly-born Holstein calves were observed. There were two papillary muscles in the leftventricle, named cranial wall anterior and cranial wall posterior papillary muscle, respectively. The cranial wall anterior papillary muscles were bigger than that of cranial wall posterior papillary muscle. There were three types of papillary muscles, among 40 papillary muscles, attached type totals 35, 87.5% and intermediate type were 5, 12.5%. Free type was not found. The number of chordae tendineae of newly born Holstein calf was 13.00±1.30.