Muscle mass contractions while in the reduce legs act as pumps, and elastic vein partitions help blood return to the guts. Small valves within the veins open as blood flows towards the heart, then close to cease blood from flowing backward. Pregnancy. Throughout pregnancy, the blood volume in the https://howtogetridofthemnaturall98529.loginblogin.com/24956669/the-ultimate-guide-to-प-र-क-नस-क-इल-ज