A major effect of long-term weightlessness involves the loss of bone and muscle mass. Without the effects of gravity, skeletal muscle is no longer required to maintain posture and the muscle groups used in moving around in a weightless environment differ from those required in terrestrial locomotion.
Marina /ma-ri-na/ [3 sylls.] as a girls' name is pronounced mah-REE-nah. It is of Latin origin, and the meaning of Marina is from the sea. From marine. A saint's name. Shakespeare gave the name to Pericles' daughter in his play Pericles, Prince of Tyre.
Marina is a very prominent first name for women (#501 out of 4276, Top 12%) and also a very prominent surname for both adults and children (#29447 out of 150436, Top 20%). (2000 U.S. Census). Charted below is the birth name popularity of Marina for girls.