There are three main sections of the spine:
Cervical - the seven vertebrae of the neck
Thoracic - twelve chest vertebrae supporting the ribcage
Lumbar - five vertebrae of the lower back
Pelvis and Sacrum – there are also five bones fused together to form the Sacrum, as well as three to five bones that form the coccyx or tailbone.
There are many poses or asanas in yoga that can help you to strengthen the muscles around your back and your core to hold up your skeleton. Just another reason to do yoga!!
Blessings and Namaste,