GOOD BOY PLUTO! NOW SOME DATUM: The most serious consequence of weightlessness, however, is the deconditioning (weakening) of physiological systems such as the cardiovascular system. On Earth, the heart must operate against gravity to sustain blood flow and proper functioning of the cardiovascular system. Under zero-gravity conditions, the heart lessens its pace to achieve an equilibrium appropriate to decreased demands. Reduced output of the heart, decreased heart rate, decreased heart size, and diminished blood volume regulation result. Diminished gravity is also a significant problem in the way it affects the musculoskeletal system. Reduced weight-bearing in space leads to bone disuse symptoms including loss of calcium, nitrogen, and phosphorus and decreased bone size and volume. As discovered on the Mir space station, 1.2 % of bone mass in the lower hip and spine is lost per month in microgravity! Decreased muscle tone and strength, weakened reflexes, and decreased tolerance for physical work are further negative consequences of a zero-g environment. The last thing we want for future Mars explorers is for them to arrive on the planet unable to walk or work because of a weakened heart or muscular system. Bed-rest tests on Earth, which simulate some of the effects of zero g on the body, are used in conjunction with studies on the astronauts living in space to help determine how we can help keep crews fit .... WOE!!!!!!!!!!!!!!!!!!!! PLUTO OKAY YOU CAN LEAVE NOW. SH EVERYBODY! DONT TELL PLUTO BUT IT WASNT THAT IMPORTANT FOR HIM TO BE THERE, BUT IF ITS INCLUDED LET HIM GO AND PLAY FOR AWHILE. BACK TO FUTURE, OOPS WORK--------- *********************************************************************************THE ASTEROID BELT WAS A PLANET******** EU REKA! VOI LA!!!
Posted on: Sat, 08 Mar 2014 02:15:51 +0000
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