Astronaut physiology

show/hide words to know

Astronaut: a man or woman whose job it is to fly in space. Astronauts are usually really good at math and science, and aren't scared of sitting on top of rockets.

Glamorous: something exciting and attractive.

Gravity: the attraction of one body to another. Gravity gives objects weight and causes them to fall to the ground if dropped... more

Lymph: a fluid that circulates through your body, helping to fight infections.

Frenzied Fluids

Space may sound glamorous, but living in space changes the way you look, and in space you should never stray too far from a bathroom. Gravity affects water and lymph, fluids found in our bodies. Lymph helps our bodies fight against sicknesses like the cold or flu and other infections.

Fluid movement in body

A diagram showing fluid movement in the body.

On Earth, fluids are being pulled down by gravity, and our muscle movement helps to move them back up. In space, because body fluids aren’t pulled down by gravity, they collect around the chest and head.

The upper body swells, and astronauts get what’s called “puffy face.” Because fluids don’t move around the body as well as when on Earth, these pools of fluid fool the body, making it think it is carrying too much water. This makes the astronauts have to pee a lot. In space, astronauts pee more and drink less, so they can become dehydrated very easily.

View Citation

You may need to edit author's name to meet the style formats, which are in most cases "Last name, First name."

Bibliographic details:

  • Article: Frenzied Fluids
  • Author(s): Dr. Biology
  • Publisher: Arizona State University School of Life Sciences Ask A Biologist
  • Site name: ASU - Ask A Biologist
  • Date published: December 8, 2011
  • Date accessed: September 21, 2018
  • Link: https://askabiologist.asu.edu/frenzied-fluids

APA Style

Dr. Biology. (2011, December 08). Frenzied Fluids. ASU - Ask A Biologist. Retrieved September 21, 2018 from https://askabiologist.asu.edu/frenzied-fluids

American Psychological Association. For more info, see http://owl.english.purdue.edu/owl/resource/560/10/

Chicago Manual of Style

Dr. Biology. "Frenzied Fluids". ASU - Ask A Biologist. 08 December, 2011. https://askabiologist.asu.edu/frenzied-fluids

MLA 2017 Style

Dr. Biology. "Frenzied Fluids". ASU - Ask A Biologist. 08 Dec 2011. ASU - Ask A Biologist, Web. 21 Sep 2018. https://askabiologist.asu.edu/frenzied-fluids

Modern Language Association, 7th Ed. For more info, see http://owl.english.purdue.edu/owl/resource/747/08/
International Space Station Crew members

In space, it is easy to become dehydrated. Here astronauts show off special drink containers.

Be Part of
Ask A Biologist

By volunteering, or simply sending us feedback on the site. Scientists, teachers, writers, illustrators, and translators are all important to the program. If you are interested in helping with the website we have a Volunteers page to get the process started.

Donate icon  Contribute

Share this page:

 

Share to Google Classroom