Dictionary » D » Dorsal spine

Dorsal spine

Definition

noun

One of the three distinct portions along the spine or the vertebral column (the other two are the cervical spine and the lumbar spine), and is the longest section comprised of twelve thoracic vertebrae that house the spinal cord along the rachidian channel.


Supplement

The eleventh and twelfth dorsal vertebrae are called false ribs because they are not joined with the sternum. Hence, the dorsal spine (also known as thoracic spine) allows flexion, extension, rotation and leteral flexion movements.


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


Why do you keep talking about species

... of head, fins about 100 modern species Chordata Cord Chordates Hollow dorsal nervous chord, notochord, pharyngeal slits, endostyle, post-anal tail ... calcified spines about 7,000 extant and 13,000 extinct species Echiura Spine tail Spoon worms Set of hooks at posterior end about 140 Entoprocta ...

See entire post
by gamila
Mon Jun 29, 2009 5:35 pm
 
Forum: Evolution
Topic: Why do you keep talking about species
Replies: 23
Views: 49851


This page was last modified 06:59, 3 August 2008. This page has been accessed 60,423 times. 
What links here | Related changes | Permanent link