Anatomy of the Ear. The ear is made up of three parts: the outer, middle, and inner ear. All three parts of the ear are important for detecting sound by working together to move sound from the outer part through the middle and into the inner part of the ear. Ears also help to maintain balance. Share this:
The major skeletal muscle groups forming the upper body are the abdominal, pectoral, deltoid, trapezius, latissimus dorsi, erector spinae, biceps, and triceps. The major skeletal muscle groups of the lower body are the quadriceps, hamstrings, gastrocnemius, soleus, and gluteus. Muscles move by contracting.
Three individual muscles form the hamstrings group: biceps femoris, semitendinosus, and semimembranosus. The hamstrings work together to flex the leg at the knee. In the calf region of the leg, the gastrocnemius muscle extends from the distal end of the femur through the calcaneal (Achilles) tendon to the calcaneus of the heel.