Biomechanics is the science concerned with the action of forces, internal or external, on the living body . Biological masses are under influence of both intrinsic and extrinsic forces of gravity. Comaparative impact of extrinsic forces of gravity of earth as well as of micro-gravity, as available in space, are being studied on living organisms.

On presence of intrinsic force of gravity in biological mass, a conceptual model of domain of various basic forces in the particle pyramid of biological mass had been outlined. In ten-storied particle-pyramid of biological organisms {viz. (i) electron, proton, neutron (ii) atoms (iii) molecules (iv)compounds (v) organelles (vi) cells (vii) tissues (viii) organs (ix) organ systems and (x)organism /individual}: it was contemplated that short range nuclear forces might be stronger below atomic level; medium range electrostatic forces might be stronger up to compound levels or so but at higher levels of particle pyramid, gravitational force would be stronger after increase in mass through passing of age and fall in electrostatic potential in time-bound biological system.

Living species were contemplated to live and grow out of balance between individual’s inward force of self-gravity and outward internal pressure so also on interaction with extrinsic gravitational pressure and pull of the earth .

Growth and development through isostatic balance, convectional flow pattern around self-gravity of biological mass were sketched .

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