Why the body of the lumbar vertebra is larger than that of the thoracic vertebra and in the thoracic vertebra more than in the cervical vertebra?

Answer 1

The thoracic spine has twelve vertebral bodies. These structures have very little motion because they are firmly attached to the ribs and sternum (breastbone). Distinguished by the presence of coastal facets for the articulation of the heads of ribs. Body is intermediate in size between the cervical and lumbar vertebrae

The lumbar spine has five vertebral bodies that extend from the lower thoracic spine (upper back) to the sacrum (bottom of the spine). The vertebral bodies of the lower back are the largest of the spine because they bear the majority of the body's weight. The paired facet joints on the back of the vertebral segments are aligned so that they allow flexion/extension but not a lot of rotation. Does not have coastal facets nor transverse process foramina

Answer 2

thoracic are the middle twelve vertebrae after the first seven cervical vertebrae. They do not have the transverse foramen of the cervical vertebrea. Thoracic vertebrae all articulate with ribs, therefore they have a transverse coastal facet for the tubercle of the rib. Lumbar vertebrae are the five massive ones above the sacrum. Note the word massive. They are thick and have stout spinous processes. Everything on them is thicker and stouter than any of the others. The lumbar vertebrae have triangular vertibral foramen, whereas thoracic have circular vertebral foramen and cervical have a large, almost trapazoidal triangular vertebral foramen. From a superior view, the transverse process of a thoracic points up at an acute angle to the spinous process and the transverse process of a thoracic is almost at a ninety degree angle to the spinous process. I hope this helps.

Answer 3

thoracic vertebra have a more rectangular spinous process the body is also fairly thick though not as thick as the lumbar vertebrae and thicker than cervical vertebra

the thoracic vertebra also have facets for the tips of the ribs on the lateral sides of the body
Thoracic Vertebrae are the vertebrae from which the ribs extend. They usually have longer spines on their backs, to which muscles are attached. These muscles help to support the head and back.

Answer 4

Lumbar vertebrae are bigger and more weight bearing than cervical vertebrae. They can be distinguished from cervical vertebrae because they do not have the foramen transversaruim within the transverse process. They also do not have facets on the sides of the body. Cervical vertebrae are immediately below the skull and support the neck. Cervical vertebrae also have a foramen in each transverse process, unlike thoracic and lumbar vertebrae.

Answer 5

T1 T9 T10 T11 T12 are atypical each of which has different characteristics from typical

Answer 6

You have marking of rib on the body and transverse process of the thoracic vertebra.

Answer 7

It all has to do with the amount of weight ABOVE and the number of nerves that move out into the muscles of the shoulders, arms, back and legs.