Veins and Venules: Veins are the large return vessels of the body and act as the blood return counterparts of arteries. Because the arteries, arterioles, and capillaries absorb most of the force of the heartâs contractions, veins and venules are subjected to very low blood pressures.
Wondering when to change your automatic transmission fluid (ATF)? Most manufacturers recommend replacing transmission fluid every 30,000 to 60,000 miles. If you tow, or do mostly city driving with constant changes of gears, it may be wise to change your ATF even more often. Here's why. Your automatic transmission has a lot of moving parts.
How often you need to change your pad depends on how heavy your flow is and what type of pad you are using. Pads come in all different absorbencies, so match up the pad absorbency with your flow. On your heavier days, you may need a more absorbent pad and on our lighter flow days a less absorbent one will do. No matter how heavy your flow is though, you should change your pad at least every 3 or 4 hours so you donât end up with an odor from bacteria that can grow in the blood. Yuck! As often as you need to. The truth is, the length of time you can wear a pad really depends on how heavy your flow is.