法氏囊是鸟类特有的结构，位于泄殖腔后上方，囊壁充满淋巴组织。
Bursa is the unique structure of the birds, is located at the top of the post-cloacal, the wall is full of lymphoid tissue.
结果：（1）寰椎后弓较纤弱，横截面呈扇形，内侧面从后上方向内下方倾斜；
Results: (1) The posterior arch of atlas was thin with a fan-shape section, whose inner plane descended from back to inside.
它有四个不同的尺寸-从3.5到12米，安装高度-而又适合巷道和后上方安装。
It comes in four different sizes - for mounting heights from 3.5 to 12 metres - and is suitable for side entry and post top mounting.
在膝关节后上方，坐骨神经分成两条神经，胫神经和腓总神经，它们都支配小腿和足。
Above the back of the knee, the sciatic nerve divides into two nerves, the tibial and the common peroneal nerve, both of which serve the lower leg and foot.
用一手拇指和食指用力往下按住鼠头，另一只手抓住鼠尾，用力向后上方拉动，造成脊髓横断致断颈死亡模型；
Cut off neck to death group: the thumb and index finger of one hand held the rats'head, the other hand grasped the tail pulling by force , resulting in spinal cord transaction to death ;
用一手拇指和食指用力往下按住鼠头，另一只手抓住鼠尾，用力向后上方拉动，造成脊髓横断致断颈死亡模型；
Cut off neck to death group: the thumb and index finger of one hand held the rats'head, the other hand grasped the tail pulling by force , resulting in spinal cord transaction to death ;
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