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The smooth muscles inside the blood vessels adjust to the micro gravity in order to work properly, the same way they work on Earth. Also the heart rate slows since the muscles of the legs are not in use due to the lack of gravity

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Q: What happens to the heart and blood of an astronaut in space?
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Related questions

What happens to muscle and bones in space?

the astronaut heart and muscles and bones shrink and get weaker ...this because: the earth's gravitational pull is strong so the heart pumps blood harder than it needs to in space so when a astronaut is in orbit it doesn't need to work so hard so they shrink. hope this helps.


What happens when an astronaut breaks a limb?

Do you want to know what happens to the limb, the astronaut or the space programme?


What happens if an astronaut removes its helmet in space?

He/she dies!


What happens to astronaut in space?

Their bodies would become very weak.


What happens if an astronaut throws a tennis ball into space using newtons 1st law?

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If an astronaut died in space in a crash of some kind and he was bleeding would his blood be blue or red?

the blood is always red . The red colour of the blood is caused by an iron compound hemoglobin. neither in earth nor in space hemoglobin could suddenly turn blue so the blood of the bleeding astronaut will always be red


Is an astronaut someone who works at a space station?

an astronaut is someone that goes up in to space


What happens to Blood pressure of astronaut in space?

Because blood is liquid, its boiling point is affected by pressure changes. Extremely low pressure would lower the boiling point enough that the blood would boil at a temperature less than body temperature.


What happens when an astronaut pretends to throw something in outer space and what happens to him?

In weightlessness, an astronaut that "pretends" to throw an object may find his or her arm's sudden movement causes their body to rotate in the same direction. If they actually threw a mass, the forces would cause the astronaut to travel in the opposite direction.


Who was the first American astronaut to go into outer space?

Alan sheperd was the first astronaut in space.


To an astronaut in a space craft the sky appears to be?

To an astronaut in a space craft, the sky appears to be black.


How does an astronaut breathe in space?

The astronaut's space helmets allows them to breathe in space! It is connected to an air supply.An astronaut's space suit keeps him from harm from outer space objects!They live in an airtight environment (suit, ship, or station).