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Effect Of Spaceflight On The Cardiovascular and Haemostatic System - Example Papers

Effect Of Spaceflight On The Cardiovascular and Haemostatic System

The Effect of Spaceflight on the Cardiovascular and Hemostatic System

Several physiological changes occur during spaceflights, the most noticeable of which are on the cardiovascular and hemostatic system of the body.
Since the human body is adapted to live in a world of gravity, it has developed ways of combating the gravity's downward force. For example, due to the earth's gravity blood tends to accumulate in the lower limbs but the body is equipped with a system to help monitor and maintain the blood flow and pressure so that the upper body and organs get an adequate supply of blood. In the zero gravity environment during spaceflights when there is no downward force, the upper body ...

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normal circumstance. In a zero-gravity environment where there is no 'up-hill' the tiny muscles in the veins and the neurotransmitters are no longer required to function. As a result they seem to 'forget' their normal functioning and when the astronauts return to a normal gravity environment, such 'forgetfulness' causes a shortage of blood flow in the upper body. Changes in the functioning of the heart, including irregular heartbeat, have also been noted during spaceflights of longer duration.
The net effect of the above-mentioned cardiovascular changes is that 20% of male astronauts (and almost all female astronauts) experience some degree of dizziness or fainting during the first few days after their return from spaceflights. The degree of effect is directly proportional to the time spent in micro or zero-gravity environment.

Bibliography

Bird, Patrick J. (1996). "Keeping Fit" Spaceflight and Exercise. University of Florida Website. ...

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Effect Of Spaceflight On The Cardiovascular and Haemostatic System. (2016, December 2). Retrieved November 4, 2024, from http://www.essayworld.com/essays/Effect-Of-Spaceflight-Cardiovascular-Haemostatic-System/106002

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PAPER DETAILS

Added: 12/2/2016 08:38:56 AM
Category: Health & Medicine
Type: Premium Paper
Words: 429
Pages: 2

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