San Diego has on average 146 sunny days and 117 partly cloudy days a year. The average annual precipitation is less than 12 inches (300 mm), resulting in a borderline arid climate.
Skeletal muscle makes up the bulk of muscles in the body. See also skeletal muscle groups. A whole skeletal muscle is considered an organ of the muscular system. Each organ or muscle consists of skeletal muscle tissue, connective tissue, nerve tissue, and blood or vascular tissue. Skeletal muscles vary considerably in size, shape, and arrangement of fibers.
Skeletal muscles can do a short, single contraction (twitch) or a long, sustained contraction (tetanus), and might ache after strenuous exercise. The stomach is an organ of the alimentary canal, a muscular tube that forms part of the digestive system. The wall of the stomach contains smooth muscle tissue.keletal Muscles Bodily movement is carried out by the interaction of the muscular and skeletal systems. For this reason, they are often grouped together as the musculo-skeletal system. Muscle is attached to bone by tendons and other tissues, and exerts force by converting chemical energy into tension and contraction.