По структуре и функции мышцы можно разделить на три группы . Гладкие мышцы сокращаются непроизвольно. Соединительная

The structure and function of the muscle can be divided into three groups. The smooth muscles contract involuntarily. The connective tissue of the smooth muscles includes nerves and blood vessels. The cross-striped or skeletal muscles react to the changes in the environment. The fibers of the heart muscle are steady.