Outer Space By: Jen Russ
What is Gravity? Gravity is created by the interaction between two bodies. The force of gravity increases as the size of the two bodies increases and/or the distance between them decreases.
When gravity disappears, weightlessness appears.
Weightlessness When there is no sensation of weight.
The feeling astronauts get while in outer space.
Organ Systems Affected
Circulatory System On Earth, t he heart must do more work to supply the upper body, because blood is naturally drawn downward by the force of gravity.
In space, bodily fluids no longer flow back down naturally by gravity, yet the heart is still programmed the way it was on Earth. So, under the pressure of the heart and the veins and arteries, the blood rushes to the person’s torso and head. Also known as Puffy space syndrome.
Eventually, the body will adapt to puffy space syndrome by changing the circulation of blood throughout the body.
Muscular/Skeletal Systems The musculoskeletal system deteriorates. Muscles become flabby and lose tone and mass. The bones become weaker due to loss of minerals.
Vertebrae separate in back and cause astronaut to become taller.
The body will stay like this until the person goes back to Earth, where there is gravity.
Nervous System Balance and orientation disturbed. Body lacks normal points of reference.
Only useful information the brain receives comes from the eyes, muscles, tendons, and inner ear.
Eventually, the body will no longer be disoriented because of zero gravity.
How Long Can Humans Last In Outer Space?
One could last for almost two minutes without suffering any irreversible damage while in outer space, unprotected.
Space Suit A complex system of garments, equipment and environmental systems designed to keep a person alive and comfortable in the harsh environment of outer space. Pressurized suits are needed in the sparse atmosphere. A stable internal pressure Means to recharge and discharge gases and liquids Means of collecting and containing solid and liquid waste
Means to maneuver, dock, release, and/or tether onto spacecraft.