Parts of the Muscular System

Located at the front of the thigh, the quadriceps muscles run from the hips down to the bottom of the thigh (femur) and insert into the knee cap (patella). They straighten (extend) the knee and help bend (flex) the hip. Full Answer

The muscles in the lower extremities are the following: Buttocks. Hip flexors. The muscles that flex your hip up. Quadriceps. Four large muscles in the front of the thighs that are the key to healthy knees. Hamstrings. Muscles in the back... Full Answer

Within the core, the muscles are divided into two types: the stabilizers and the movers. Stabilizers: Transverse abdominis Internal obliques Lumbar multifidus Pelvic floor muscles Diaphragm Transverspinalis Movers: Rectus abdominis... Full Answer

The oblique abdominal muscles consist of the external and internal oblique abdominal muscles (trunk muscles that help to rotate and flex the spine and pelvis) responsible for rotation and flexion of the spine. Developing oblique abdominal muscle... Full Answer

Located in front of the top of the rib cage, the pectoralis major muscle runs from the clavicle and sternum to the top of the arm (humerus). It contracts and brings the arms to the midpoint of the body and internally rotates the arm. Full Answer

The muscles of the upper extremities are the following: Latissimus dorsi. The big V-shaped back muscles. Rotator cuff. Four small muscles that provide shoulder stability by keeping the arm bone (the humerus) centered in the socket. The... Full Answer

The rectus abdominus muscle originates at the pelvis and inserts into the sternum as well as ribs 5 - 7. This muscle flexes the spine or assists in posteriorly tilting the pelvis and can dominate over the other abdominal muscles (trunk muscles... Full Answer

You have 660 muscles. They make up almost 50% of your lean body weight. Full Answer

Located at the lower portion of the spine and top of the hip, hip flexor muscles insert into the upper middle portion of the thigh (femur). They help bend (flex) the hip and rotate the thigh externally. Full Answer

Type I muscle fibers are slow-twitch, small muscle fibers used for carrying light loads over long distances. These fibers have increased resistance to fatigue, and are well suited for activities related to physical effort requiring strength and endurance. Full Answer