I understand most implications of Quantum mechanics on the microscopic world, at least in a non-mathematical sense. However, why is the macroscopic world any different? I understand that there is a change in mass, which affects the Heisenburg Uncertainty Principal to make the uncertainties in momentum and position extremely small, but since we are all just a collection of much smaller particles, why are all our particles behaving according to quantum mechanics and jumping all over each other through our bodies and making a complete mess of any structure. Is the chemical bonding energy between the different atoms in our body really strong enough to overcome the principals of quantum mechanics and hold us together? Or is the large mass of a nucleus (compared to an electron or photon) enough to keep the atom itself from flying all over the place.