2007-03-28 00:09:15 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
The heart pumps it like it always does. Blood flow doesn't depend on gravity.
2007-03-28 00:12:47 · answer #1 · answered by Gene 7 · 1⤊ 1⤋
The same as under gravitational conditions: pumped by the heart and peristaltic movement in the walls of bigger arteries.
Blood never circulates from the brain to the toes, but from the heart to the brain and back to the heart/ from the heart to the toes and back to the heart.
2007-03-28 07:23:56 · answer #2 · answered by Vango 5 · 1⤊ 1⤋
As others have said, it is pumped by heart. However, it would burst out of the veins/ arteries without atmospheric pressure, gravity does not come into play, and that is why it required to maintain pressure in the cabin and suits. On earth blood pressure is what makes us survive and not get squeezed by atmospheric pressure.
2007-03-28 09:04:26 · answer #3 · answered by indisun 2 · 0⤊ 1⤋
Capilary action, gravity isn't required, in fact it gets in the way. Blood when you are standing on the Earth does have to get from your FEET back up to your heart, fighting against gravity!
2007-03-28 07:26:25 · answer #4 · answered by Anonymous · 1⤊ 2⤋
the heart keeps the blood circulating.
2007-03-28 08:50:06 · answer #5 · answered by neutron 3 · 0⤊ 1⤋
their suits and cabins are pressurized
2007-03-28 07:19:02 · answer #6 · answered by jim m 7 · 0⤊ 2⤋