The effects of spaceflight on the heart
Gravity is not just a force, it's also a signal - a signal that tells the body how to act. For one thing, it tells muscles and bones how strong they must be. During spaceflight astronauts are exposed to extreme environmental factors that differ dramatically from those on earth. These factors include altered lighting light gravitational force and radiation. spaceflight has been shown to have significant effects on numerous body systems, including the musculoskeletal, neuroendocrine, and immune systems. including severe effects on the heart and cardiovascular system. The effects of microgravity on cardiac are on its function, structure and gene expression. Generally in the cardiovascular system , gravitational forces significantly affect venous return, cardiac output, and arterial and venous pressures. Thus when astronaut travel to space and exposed to all these factors he has many disorders of his body and especially to cardiovascular system and as this system has an important function so any disorder of it , it will affect the whole body.
Spaceflight is one of the most important things that going to be in the future , for which can used by most people and not consider only for the astronauts that's because of all the recent finds that discovered by NASA that's there are chances for living in the other plants But even with impatience for use it and all of its benefits its also has many hazards affect the human body Some of these hazards affect the cardiovascular system , including the heart or either the vessels , affect the structure the function … etc. These hazards are results of the radiation ultraviolet waves lighting light