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Just like circulatory system, respiratory system, or reproductive system, our body has muscular system. There may be people in this world who don’t know that there is something called muscular system. Muscles make up 40% of body weight. Learn many more amazing muscular system facts today in this article.

Muscular System Facts 1-10

1. Everyone knows that muscles help in the movement of body. All the muscles in the body are divided into 3 types – skeletal, cardiac, and smooth muscles.

2. Skeletal muscles are the ones which are attached to the bones or cartilage. It helps in posture, movement, and support of the body.

3. Smooth muscles are the ones that line internal organs like stomach, liver, intestines, pancreas, lungs, ovaries, testicles, etc.

4. Cardiac muscles are the ones that make up the heart. They are not present anywhere else in the body. They are the ones that pump the blood.

5. Did you know that 43 muscles contract when you frown and only 17 muscles contract when you smile?

6. The cells that make up muscles are also of two types – striated and non-striated muscle cells.

7. Muscles are bundles of muscle cells. Each muscle cell has alternating bands of actin and myosin (muscle pigments). Actin and myosin help in the contraction and relaxation of muscles.

8. Everyone knows that we have 206 bones. Do you know how many muscles we have? We have 600 to 650 muscles in total.

9. We already told you in the introduction that muscles make up around 40% of the total body’s weight. If distribution is considered, muscle cells occupy 75% of the cells of the body.

10. 1/4th of protein synthesis of the body takes place in the muscular system. As we age, the strength and mass of the body decrease over time and hence we become weak in old age.

Muscular System Facts 11-20

11. Gluteus Maximus is the muscle which covers hip and buttocks region. It is the largest muscle of our body.

12. It is also the main muscle which helps us in climbing stairs.

13. Tensor Tympani, present in the ear, is the smallest muscle in our body. It connects inner ear to eardrum.

14. One of the strongest muscles are found in the jaws.

15. Muscles are attached to bone through tendons. Tendons also attach muscles to eyeballs.

16. Cardiac muscles are the longest running muscles in our body. These muscles pump around 2500 gallons of blood every day!

17. Another division of muscles is on the basis of body’s control. The muscles that we can control are called voluntary and the ones that we can’t control are called involuntary muscles. Muscles of legs, hands are voluntary and muscles of heart, stomach, lungs are involuntary.

18. When muscles contract, they release a lot of energy, blood vessels dissipate this energy to the skin so that muscles don’t get overheated.

19. Eye muscles are the busiest muscles in our body. Other muscles that are busy are muscles of diaphragm and cardiac muscles.

20. Sartorius is the longest muscle of our body. It partly covers the thigh. It helps in knee joint and hip movement.

Muscular System Facts 21-30

21. Did you ever dream of falling from a height when you are asleep? It is a pretty common thing. This phenomenon is called hypnic jerk or hypnogogic jerk. These movements are caused by our muscles.

22. The word muscle is derived from Latin word ‘musculus’ meaning little mouse.

23. There is something called muscle memory where muscles attain perfection by practicing an act time and again.

24. Muscles are 15% denser than fat tissue.

25. Skeletal muscles are divided into two types which are slow twitch (Type I) and fast twitch (Type II) muscles. Slow Twitch muscles are the ones which carry more oxygen and are red in color. These muscles can contract for a longer period of time. These muscles work perfectly well for aerobic sports like cycling and running.

26. Fast Twitch muscles are the ones which carry less oxygen and are less red in color. These muscles contract very fast and can contract only for some time. These muscles work amazingly for sprinting, weightlifting, etc.

27. The least used muscle in our body is lumbar multifidus which cover lower back.

28. Coming to the functions of muscles, there are many. The most basic function of muscles is that they help in the movement of our body.

29. Muscles also stabilize the body and help in tasks like lifting weights or playing a game.

30. Skeletal muscles help in maintaining posture. Weak and stiff muscles lead to bad posture. Bad posture in turn leads to muscle pain in neck, shoulders, etc.

Muscular System Facts 31-40

31. Cardiac muscles are the ones which help in the circulation of blood. The muscles of diaphragm, lungs, etc. are extremely important for respiration.

32. The muscles of most of the organs of respiratory, circulatory, excretory, reproductive, digestive systems, etc. are important for the functioning of the different systems of our body.

33. The six skeletal muscles of eye help in vision. The smooth muscles of uterus help in the process of childbirth. `

34. Muscles also help in protecting internal organs like heart and lungs.

35. When the body temperature falls, the skeletal muscles increase activity to increase the temperature of our body. Shivering is one such example. Blood vessels’ muscles contract so that they can maintain the body temperature.

36. When smooth muscles relax. It increases blood flow and releases the extra energy via skin thereby decreasing body’s temperature. Thus muscles, in their own way, regulate our body’s temperature.

37. Muscles can only pull, they can’t push! Most of the times, muscles work in pairs. Motor cortex of the right side of the brain controls the movement of muscles.

38. There are a lot of diseases that plague muscles. Unlike for many organs, muscles don’t have a particular doctor who could treat muscular diseases and disorders.

39. Common muscular diseases are inflammatory myopathies, dermatomyositis, inclusion body myositis, muscular dystrophy, myasthenia gravis, etc.

40. Common symptoms are weakness, muscle spasms, cramping, twitching, etc. Electromyography (EMG) is used usually to diagnose muscle diseases and disorders. In EMG nerves are stimulated and the responses are measured and compared to the normal measurements. For milder muscular issues, steroids and medications are given. Mild form of chemotherapy is also used in muscular disorders.

Hope you liked our muscular system facts. If you want to know more about such topics, stay tuned.


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