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.
These factors will be considered in two tutorials: Part 1: Cerebral Blood Flow. Part 2: Intracranial Pressure. Part 1: Cerebral Blood Flow. The brain is unusual in that it is only able to withstand very short periods of lack of blood. supply (ischaemia).