Just as it is believed, a human body is very complex in its structure. It is formed from many organs and systems, with each part playing a significant role in the proper functioning of the entire body. One such system is the muscular system. The human body comprises of over 650 muscles, allowing an individual to perform all activities, right from writing to speaking, running to jumping, and breathing to digesting meals. As such, the primary function of the muscular system is to help body parts move and assist organs in doing their jobs. The muscles convert energy into motion, grow stronger with practice, and are long-lasting and self-healing. The body is made up of three types of muscles, namely, smooth, cardiac, and skeletal. However, it also has facial muscles and tongue that are a unique kind in themselves. Let’s take a look at some interesting and fun facts about the muscular system of a human body.
Interesting Facts About Muscular System
- Muscles are distinguished into voluntary and involuntary. While involuntary muscles function within the body without the body having any control over them, voluntary muscles are those which are under one’s control. Heart movement, digestive system, respiratory system, and other internal organs are involuntary muscles, while muscles in hands, feet, on face are voluntary.
- Irrespective of the kinds of muscles in any body, all of them are made up of the same kind of materials. They are formed from a kind of elastic tissue, similar to what rubber bands are made of.
- The skeletal muscles are attached to the bones with the help of tendons. These are voluntary muscles as the brain sends signals to the muscle when a body wants to move. The nerves surrounding the skeletal tissue force the tissue to contract, thereby pulling the bone and causing the necessary movement. Skeletal muscles make three types of contractions, namely, short, long, and single.
- Gluteus maximus in the buttocks, deltoid muscle in the shoulders, biceps and triceps in the arm, pectoralis in the chest, rectus abdominus in the abdomen, and quadriceps and hamstring muscles in the legs are some major skeletal muscles.
- Smooth muscles are aligned along the gastrointestinal tract. As such, they are present in the respiratory system and digestive system. They are also present in the blood vessels allowing them to constrict and make the blood fluid move. Contrary to skeletal muscles, smooth muscles are involuntary as they are controlled by the nervous system and hormones.
- Bladder, uterus, and eyes are some examples of smooth muscles.
- True to their name, cardiac muscles are tissues that form the walls of the heart. They are a group of parallel fibers that show short single contractions; thus, they are known as striated muscles. Though cardiac muscles are arranged similar to skeletal muscles, but they are not attached to the bone. Just like smooth muscles, cardiac muscles too are involuntary.
- The face of a human body contains more than 30 muscles that help in creating looks, such as surprise, happiness, sadness, and frowning.
- The eye muscles are the busiest muscles in the body, with an estimate of moving more than 100,000 times a day.
- The gluteus maximus muscle in the buttocks is the largest muscle in the body, while the smallest is the stapedius muscle, found in the middle of the ear.
- The chewing muscles are strongest muscles while the Sartorius muscle is the longest muscle.
- The tongue is a unique muscle that is attached only on one end and free at the other end. It is made up of a group of muscles that work in unison, allowing an individual to chew and swallow food, and talk.
These interesting and fun facts about the muscular system must have surely amazed you about the functioning of the body. Without the muscular system, the human body wouldn’t be able to move and work.