Geo-Aerospace Blood Circulation in Humans

Abstract

Blood circulatory system is a system that includes heart, blood vessels and blood which is circulated throughout the body. The blood circulation in humans is the process where blood is circulated throughout the body in closed circuits. Blood circulation on land is normal unless sudden position change from sleep to stand and prolonged standing. When a body freely falls in standing position in air towards earth, it experiences –G effect as more blood tends to move towards head. When a body accelerates upwards it experiences +G effect as blood accumulates in legs. A fighter pilot’s G-suit also called ‘anti-G suit’ is one-piece jumpsuit that protects pilot from feeling discomfort and losing consciousness from pressure of G-forces bearing down on pilot. When a person is in microgravity their blood circulation changes drastically. It can cause muscular atrophy, blood pressure lowering etc. What we learn about physiological changes on space has important applications on ground as well, in part because many of the changes seen in space resemble those caused by aging on earth. Important research is being done on the space station to learn more about SANS [Spaceflight Associated Neuro-Ocular Syndrome] and to develop and test counter measures to many possible different cardiovascular changes.