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What happens to the human body in the Space?

What happens to the human body in the Space?

Every one of us dreams off to move into space and step on the surface of any planet other than earth one day. Scientists are working tirelessly to make this dream possible, but as we all know that the human body is not adaptable to sustain in space. Humans cannot manage to live on other planets until they find ways to minimize the adverse effects of space on the human body. This article summarizes the ramifications of space on the human body. After reading this article, you will come to know how scarier this reality is!

Effects of space on the human body

Space affects the overall human body. It has effects on blood circulation, the mass of bones and muscles, brain cells, heart functionality, immune system, and much more. Let’s have a brief account of it.

  • Microgravity

Earth pulls everything due to its gravity. The human body is adaptable to earth gravity. When someone moves far from the Earth atmosphere, the effects of gravity decreases with distance. Therefore, the human body observes weightlessness in space. This weightlessness is microgravity. Microgravity has unfavorable on human organs and fluids. Many types of fluids are present in the human body. Some examples are blood, cerebrospinal fluid, and interstitial fluid. Microgravity affects the flow and distribution of fluids and poses serious health problems.

  • Cardiovascular System

Space has many effects on the cardiovascular system. More blood is present toward the head region while its flow decreases in the lower parts of the body. Production of red blood cells also decreases due to the unequal distribution of blood. Cardiac muscles experience quicker atrophy in a microgravity environment. Many publications illustrate that people returning from space are more prone to cardiovascular disorders. Moreover, cardiovascular problems are the leading cause of mortality among astronauts. 

  • Neurological System

It affects the hearing, vision, and olfaction to some extent. Other experiments show the degenerative effect of space radiations on brain cells. Space influences brain cells and sensory organs.

  • Musculoskeletal System

One worth-mentioning thing about our muscles and bones is that they need gravity for proper movement. In space, this gravity is absent, so the process of muscles and bones atrophy increases. Bones lose their density and are at more risk of fracture. Bones lose mass quickly that may cause kidney stones. 

  • Immune System

Where space affects the human body, it affects the immune system as well. Studies suggest that many proteins that are present during inflammation increase in levels. Many genes become activated that cause cancer. Wound healing is different and relatively slow in space. Space radiation even affects the microbiome (small organisms present in the human body).

  • Aging

It is quite interesting to know that process of aging is much faster in space than on earth. The reason behind it is the changes in the DNA. The body produces many different types of proteins that accelerate the process of aging. Scientists are trying to find genes that are responsible for aging.

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  • Sleeping Problems

When someone goes into space, he may experience sleep problems. There is a biological clock in our brain that controls our sleeping behavior and timing according to sunrise and sunset. When someone is in space, he experiences sunrise and sunset almost 16 times a day. It disrupts the human sleep cycle and the biological clock.

  • Effect on DNA

DNA of human control its all activities and space radiations most affects the human DNA. Space radiations have strong ionizing powers that can alter the structure of DNA. Any change in DNA may have serious health effects. Some changes increase the process of aging. Some changes induce the production of genes that cause cancer. 


These are some of the most common and potentially harmful effects of deep space on the human body. Humans are not born to live somewhere other than earth. But who knows, one day it is possible to live in deep space without any harmful effects. Then those people will be superhumans, no doubt.








About The Author


She is a scientific researcher and freelance writer.


  1. Akhtar

    This is an excellent article, very well written..

    • Tasha

      Thank you!

  2. Farooque Janjhi

    interesting, excellent writeup. keep it up.

    • Tasha

      Thank you so much!


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