Let’s study about the bone of the backbone.
Let’s study about the bone of the backbone.

How many bones are the backbones?

There are seven cervical spines, twelve thoracic spines, and five lumber spines.

Total is 24.
Cervical spine is literally the bone of a neck.
The animation below is what looked at the backbone from the right side, and there are seven bones.
The 1st cervical spine that became round is in contact with the bone of the head.
The second cervical spine plays a roll of axis for the first cervical spine which a head puts on so that a head turns in right and left and is able to be waved around.
How can the 1st and the 2nd bone seen from directly above be seen from the right side?
The axis of the 2nd bone has entered from under the 1st bone.
The 1st and 2nd bone seen from directly above

The 1st and 2nd bone seen from the right side
As the above animation and photograph showed, when a head turns around a little, the 1st and the 2nd bone from the top mainly turn.

The 3rd and 7th bone moves when a head turns strongly.

Thoracic spines are bones of a breast and there are twelve.

Lumber spines are bones of waist and there are five.

Spine is made of seven cervical spines, twelve thoracic spines, five lumber spines, and pelvis which consists of sacrum under it

The pelvis consists of gathering of three bones, an ilium, a pubic bone, and the ischium.

The place of the bottom of a sacrum is called coccyx.

They are literally the vestiges of a tail.
When you touch the bottom, you will touch it.
What are there in this pelvis?
What is it that is protected by this hard bone?
The bag which holds the urine made in the kidney - urinary bladder
The route of the urine which issues pee, that is urethra
The anus out of which the stools which accumulated in the large intestine come
The womb for a baby to be formed and grow.