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.
Maria /ma-ria/ [3 sylls.] as a girls' name is pronounced mah-REE-ah. It is of Latin origin, and the meaning of Maria is  star of the sea . Variant for Mary used in English-speaking countries in the 18th century, and popular with both Spanish and non-Spanish cultures.Revived in the 20th century due to the popularity of West Side Story , with its famous ballad .t is of Latin origin, and the meaning of Maria is  star of the sea . Variant for Mary used in English-speaking countries in the 18th century, and popular with both Spanish and non-Spanish cultures. Revived in the 20th century due to the popularity of West Side Story , with its famous ballad .