If something slows an asteroid, it may fall towards the Sun, towards Mars, or towards Jupiter. As both Jupiter and Mars move past the asteroids in their orbits, they may be pulled slightly towards those huge bodies in their orbits. In fact, Phobos and Diemos, the two tiny moons of Mars, may be captured asteroids.
R = Î´ P Q {\displaystyle R={\frac {\Delta P}{Q}}}. where R is the pulmonary vascular resistance (fluid resistance), Î´P is the pressure difference across the pulmonary circuit, and Q is the rate of blood flow through it.
So, the heart imparts enough energy to the blood to move it, against the random forces of nature such as inertia, gravity and vascular resistance (friction), through the cardiovascular system. This energy causes the blood to exert a pressure against the walls of the different blood vessels through which it flows.he answer to this question is that to keep the blood flow (Q) stable within a given organ or tissue the body must be able to adjust the vascular resistance (R), up or down, to compensate for the changes in perfusion pressure (P). Remember Q = P/R.