Dissection is then carried posteriorally along the inferior border of the ethmoid to the lamina basalis . through the lamina basalis lies the posterior ethmoid 接着向后沿筛窦的下缘切除筛窦至基板,通过基板即进入后组筛窦。
2.
Method : cross - sectional images from the superior border of c3 to the inferior border of c7 were collected from the dataset of the first chinese visible human 方法:选取首例中国数字化可视人体数据集中第3颈椎上缘至第7颈椎下缘的连续薄层断面图像。