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.
A marina is a dock or basin with moorings and supplies for yachts and small boats. A marina differs from a port in that a marina does not handle large passenger ships or cargo from freighters. The word marina is also used for inland wharves on rivers and canals that are used exclusively by non-industrial pleasure craft such as canal narrowboats. In some countries, Marina is used as a Christian female name.