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.
SHARE SHARE TWEET EMAIL. The muscles that play the primary role in moving a body part are formally known as agonist muscles and are often referred to as prime movers. Although they are categorized as prime movers for their contracting action, the same muscles can also extend. These major muscles include the pectoralis major, deltoid, latissimus dorsi, gluteus maximus and quadriceps.