人類的脊柱由33-34塊脊椎骨（拉丁語：Vertebrae）和中間起緩衝作用的椎間盤組成。這個結構通過韌帶和小的脊柱關節固定。
脊柱人為劃分為7頸椎、12胸椎、5腰椎、骶骨和尾骨（這種分類對所有哺乳類動物有效，從老鼠到長頸鹿）。人類的5塊骶骨和4塊尾骨相互融合，它們被稱之為「假脊椎」。有尾巴的脊椎動物有數目不等的尾骨。
This [ 脊椎.net ] Great Domain Name is for sale!
If your computer browser was not MS-IE7 or FireFox or OPERA; then you should click: this link
This is an IDN - Internationalized Domain Name -
You are welcome to check the IDN introduce video by ICANN (Internet Corporation for Assigned Names and Numbers): IDN Video
This video is shown on the right side of the ICANN (http://icann.org) website frontpage -
Please verify domain ownership through Domain-Whois
I'm accept interested buyers serious offers...
Thanks in advance!