What are the 24 bones out of the 26 bones in your backbone known as?

Answer 1

Vertebral Column (26 bones)

Location: Posterior midline of axial skeleton

Description: Composed of 33 vertebrae & intervertebral disks (C2-S1), distributed in 5 regions

• (C) 7 cervical vertebrae

• (T) 12 thoracic vertebrae

• (L) 5 lumbar vertebrae

• (S) 5 sacral vertebrae, fused into single bone (sacrum)

• (Co) 3-5 coccygeal vertebrae, variably fused

• Has series of curvatures along length

Also known as: "Spinal column", "spine", or "backbone"

Answer 2

The small bones that make up your backbone are called vertebrae. You have 33 when you are born, but some of them fuse to form the sacrum and others become the coccyx. So the average adult vertebral column has 26 bones in it. The vertebra are split up like so

• Cervical vertebrae- 7 of them
• Thoracic vertebrae- 13 of them
• Lumbar vertebrae- 5 of them
• Sacral vertebrae- 5, but they are fused into one
• Coccygeal vertebrae- 3-5, but fused into one

These vertebrae also curve creating the cervical curve, thoracic curve, lumbar curve, and the sacral curve. The cervical are the top vertebrae and the thoracic is next and so forth. So knowing this, you can deduce that a lumbar puncture is a puncture into the spinal cord in the lumbar region of the back.

The commonly talked about "24", refers specifically to the cervical, thoracic, and lumbar vertebrae only, which make up the "moving" spine.

The arch is formed from pedicles (short, thick processes that stick out) and laminae (broad plates that stick out). Its job is to support 7 processes (projections), 4 of which are articular (movement happens with them), 2 transverse (they stick out sideways), and 1 spinous (at the back). These processes help vertebrae stack together, and also limit the movement available once stacked (ie: why you can bend backwards only so far, as opposed to bending yourself completely in half).

By stacking vertebrae together, the bodies (ie: the front parts), form a very strong support structure.

In between the vertebral bodies, you will find vertebral discs. These are made of fibrocartilage, and consist of the outer annulus fibrosus (fibrous ring), and inner nucleus pulposis (central jelly like structure). The annulus fibrosus helps the disc keep its shape. The nucleus pulposis acts as a shock-absorber, and spreads the load across the spine equally to reduce stress gathering at any 1 point. Each disc essentially makes a cartilaginous joint with the vertebral bodies above and below it. They also act as ligaments to help hold the spine together.

However, there are other ligaments (a type of fibrous tissue) that are present in the spine to help hold things together. The 3 main ligaments (though there are others) present are:

1. Ligamentum flavum (yellow ligament)

2. Interspinous (in-between spinous processes) ligament

3. Supraspinous (above spinous processes) ligament

4. Intertransverse (in-between transverse processes) ligament

Answer 3

26 bones? You are mistaken.

There are exactly 33 bones in the human spine.

There are five regions of the spine each consisting of a certain number of bones connected to each other:

• Cervical. Consisting of 7 bones.
• Thoracic. Consisting of 12 bones.
• Lumbar. Consisting of 5 bones.
• Sacral. Consisting of 5 bones.
• Coccygeal. Consisting of 4 bones.

Answer 4

In an adult, there are 7 cervical, 12 thoracic, 5 sacral, and 2 coccygeal vertebrae.

Answer 5

There are 33 bones of the vertebral (spinal) column in humans, comprising 7 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 4 coccygeal.

Answer 6

Vertibrae..

Answer 7

Vertebrae.

Answer 8

vertebra

Answer 9

olini