The vertebrae are the first bones encountered beyond the skull. The first vertebra is the atlas, so named because it must bear the skull. The second bone is the axis, the pivot point which allows free movement of the head and neck. The hyoid apparatus is in the throat, roughly beneath and in front of these first vertebrae. It may be connected with a vertebra, or it may be a free unit. It protects the windpipe.
The body of the vertebra is called a centrum; the space between centra is the intercentrum. The vertebral centra may be one of two types, either amphicoelous (biconcave) or procoelus (concave anteriorly, convex posteriorly). The backbone runs the entire length of the tail, but should this member be lost, the replacement will be forever devoid of true vertebrae. Along the tail section, when true vertebrae are present, one can locate the plane of autotomy, which is usually a cartilaginous plate before or behind the transverse process of the vertebra.
Related Websites - Budgeting for Insurance Many people believe that they are forced to pay whatever it is that their insurance company is telling them to pay. This method of thinking may be true across the board when it comes to...
- SEO Tips for Blog Traffic Generation While it may be true to say content is king when it comes to blog publishing, the truth is that writing your blog content is not by far the only thing that you should be...
- The Switch: From Paying Interest to Earning It Over the weekend I did a little personal finance housekeeping, sorting and filing statements and other paperwork. My "To-Be-Filed" stack was growing rather large, and I recently had two occasions to hunt for a receipt...