Identify the correct description of the type of muscles present in the following areas:
The smooth muscle fibers present in the upper arm are fusiform in shape.
The smooth muscles present in the heart are involuntary and unstriated.
The muscles present in the intestine are striated and involuntary.
The muscles present in the thigh are striated and voluntary.
The muscles in the thigh are indeed striated and voluntary. Striated muscles are also known as skeletal muscles which are responsible for voluntary movements and are under conscious control. The thigh muscles, such as the quadriceps and hamstrings, are examples of striated muscles that enable movements like walking, running, and jumping. Therefore, option (4) stating that the muscles in the thigh are striated and voluntary is the accurate description. Hence, the correct answer is option 4.