8/10/2023 0 Comments Heart blood flow print![]() ![]() That's why a new experiment on board the International Space Station - called Cardiovascular and Cerebrovascular Control on Return from ISS (CCISS) - is examining how long-duration exposure to microgravity affects crew members' heart functions, blood pressure and blood vessels that supply the brain. The lack of blood flowing to and from the brain can cause astronauts to feel dizzy and sometimes even faint when they return to Earth's gravity. Instead, blood goes to the chest and head, causing astronauts to have puffy faces and bulging blood vessels in their necks.Īnd appearance isn't the only ugly side effect. There's no gravity to pull blood into the lower part of the body. In space, there's a much different result. Image at right: Expedition 15 Flight Engineer Clay Anderson works with a Continuous Blood Pressure Device (CBPD) and computer during hardware set-up for the CCISS experiment in the U.S. But raise your arm above your head, and these veins, emptied of blood, disappear. These veins will get bigger because they are full of blood. A simple experiment you can do to prove this is to let your hand hang down for a short time then examine the veins in the back of your hand. But did you know gravity also influences what goes on inside our bodies?Įvery time we stand up, gravity pulls blood into parts of the body that are below the heart. ![]() On Earth, we all know gravity affects everything around us.
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