The structure of the human body and the organs and systems that comprise it.
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连接咽和胃管。
通道或空心管，开端在鼻子后面，末端在气管和食道的顶部。
呼吸道的管状部分，它连接声带和肺部的支气管部分。
身体主要和最大的动脉，从心脏开始，直接在主动脉瓣后，把身体所需的的血液输送到左心室。
The large heavy bone at the base of the spine, which is made up of fused sacral vertebrae. The sacrum is located in the vertebral column, between the lumbar vertebrae and the ...
Bone making up the lower down back part of the pelvis. 组成骨盆下部后面的骨。
骨盆的前面中心部分。
