MedlinePlus explains that the human body has three different types of muscles: skeletal, cardiac and smooth. These muscle groups have different functions, are located in different parts of the body and have different structures.Know More
Cardiac muscle fibers have a striated appearance, and they are found in the walls of the heart, as explained by MedlinePlus. Skeletal muscles are also striated, but they are found throughout the body attached to the skeleton and ligaments. Finally, smooth muscle fibers are located in the walls of the body’s visceral organs, such as the intestines and stomach. Smooth muscle fibers are named such because they lack the striations that are found on cardiac and skeletal muscles. Smooth muscle cells are spindle shaped rather than cylindrical. Humans do not have conscious control over smooth muscles or cardiac muscles, but they can control skeletal muscles. Often, skeletal muscles are also known as voluntary muscles, whereas the other two types are known as involuntary muscles.
One interesting exception is the diaphragm, which moves the lungs to pump air in and out of the body. According to the National Center for Biotechnology Information, the diaphragm behaves as two different muscles. One part functions as a smooth muscle while the other portion functions as a skeletal muscle. This allows the diaphragm to operate on both a voluntary and involuntary basis.Learn more in Muscles
The stapedius muscle, which is the shortest muscle in the human body (at a mere millimeter in length), holds the stapes in place inside the tympanic cavity of the ear. The stapedius works in conjunction with the smallest bone in the body to aid the function of hearing.Full Answer >
There are three different types of muscle tissues found in the human body: skeletal, smooth and cardiac. All three tissue types are found in different areas of the body and perform similar functions.Full Answer >
The weakest muscle in the human body is the stapedius in the ear. The weak link to hearing modulates the conduction of sound. The muscle is the primary sound-generated reflex in the body.Full Answer >
The smallest muscle in the human body is the stapedius muscle. It is located in the middle ear, and it only measures about 1 millimeter, or 1/26 of an inch, in size.Full Answer >