As for how the trunk of the tree is stable because of the inside pith, same way, the share is dependent on the Asthi for the Sthiratha or stability. This is so much strong that, even after the complete disintegration of the skin, muscles and other avayavas, asthi doesn’t get deteriorated easily. And also, the muscles, vessels, ligaments and tendons are seen taking support on to the asthi itself for the proper mobility and facilitation of the vessels. Prustha vamsha, the Vertebral column forms the Central axis for the whole of the skeletal frame work of the body. It is a long bony structure lying in the midline, starting from the base of the Kapaala (skull), till the base of the shroniphalaka. This is formed by the stacks of Kasheruka arranged vertically. The whole prusthavamsha is dynamically coordinated with the kandaras and helps in maintaining the posture, stability, and flexibility. Most of us take this juxta position of strength, structure, and flexibility for granted until something goes wrong. Prustha vamsha is a complex, intricate construct that includes a variety of nerves, bones, joints, tendons, ligaments and muscles woven together. It is designed to be incredibly strong, protecting the highly sensitive nerve routes, yet highly flexible, providing the mobility on different planes. This Whole column of vertebrae has four curvatures anteroposteriorly alternating each other, in order to maintain the stability and posture of the body.