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人类身体的所有动作感觉都要依靠脊髓来上下传递信息,因此,脊髓的安全就变得十分重要。脊髓有两大保镖保驾护航。先来认识一位坚硬的保镖——椎骨。它在哪儿?用手摸摸脖子后面。你能摸到一些隆起物吗?那就是椎骨。人体一共有33块椎骨,包括7块颈椎,12块胸椎,5块腰椎,5块骶(di)椎,以及4块尾椎。随着年龄增长,5块骶椎融合成1块骶骨,尾椎合成1块尾骨。这些椎骨连接起来就构成支撑躯体的脊柱。如右图所示,椎骨由前方的椎体和后方的椎弓组成。椎体和椎弓围成椎孔,各椎骨的椎孔连起来形成贯穿脊柱的椎管。脊髓就藏在椎管内。
All movements of the human body feel depends on the spinal cord to send information up and down, so spinal cord safety becomes very important. Spinal cord with two bodyguards escort. First to know a hard bodyguard - vertebrae. Where is it? Touch your back with your hand around your neck. Can you touch some bumps? That is the vertebra. The human body has a total of 33 vertebrae, including 7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, 5 diacral vertebrae, and 4 caudal vertebrae. As the age increases, five sacral vertebrae merge into one sacrum, and the caudal vertebrae synthesize one coccyx. These vertebrae join together to form the spine supporting the body. As shown on the right, the vertebra consists of the anterior vertebral body and the posterior vertebral arch. Vertebral body and vertebral arch into vertebral foramen, each vertebral vertebra connected to form through the spine of the spinal canal. Spinal cord hidden in the spinal canal.