北京鸭的心神经丛和心神经节

The Cardiac Ganglia and Nerve Poexuses of Pekin Duck(Anas domesticus L.)

以大体解剖和组织切片方法观察了8例北京鸭的心神经丛和心神经节的分布与构造。支配北京鸭心脏的神经呈双侧性,左、右侧分别有一交感神经心支和迷走神经前、后二心支,它们在心外膜下分支形成6个神经丛,即左冠状丛、右冠状丛、心包横窦丛、后心丛、左上心丛及右上心丛。各丛相互交通。其中后心丛和左、右冠状丛含有小神经节。在后心丛中,有数个神经节呈串珠状排在同一神经支上。神经节内有多极神经元。

The distribution and structure of the cardiac ganglia and nerve plexuses of 8 Pekin ducks were studied by using methods of gross anatomy and histology.The cardiac nerves are consisted of the sympathetic cardiac branch,vagal anterior and posterior cardiac branches for each side.The branches subdi- vided to anastomose with each other and form nerve plexuses under the epicardium.The cardiac plexuses may be classified into left and right coronary plexuses,sinus transversus pericardiac plexus,posterior car- diac plexus,left and right superior cardiac plexuses.There are small ganglis in the posterior cardiac plexus and left—right coronary plexuses.The ganglia link as a chain on one nerve.Neurons are multipolar in the ganglia.