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.
Resistance - is opposition to flow and is a measure of the amount of friction blood encounters as it passes through the vessels. Blood flow (F) is directly proportional to the difference in blood pressure (Î´P) between two points in the circulation, that is, the blood pressure, or hydrostatic pressure, gradient. Thus, when Î´P increases, blood flow speeds up, and when Î´P decreases, blood flow declines.
The diameter of a vessel is the determining factor in how rapidly the pressure will drop as well as how easily blood will flow. As blood is flowing through a vessel some of the blood is in direct contact with the vessel's wall and loses energy through friction. This concept is referred to as peripheral resistance (PR). The energy loss decreases the blood pressure as flow continues through the vessel.