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How Many Muscles Are In The Human Body?
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5 million hairs...
To elaborate on Mr cengage's answer..
Every hair follicle on our body has it's own individual muscle.
We have about 5 million of those. Each is controlled individually.There have been documented cases of hairs moving in patterns from people that are hallucinating under the effects of snake bites, hinting at the fact the brain can control each of those muscles individually.
2 billion capillaries.
Each capillary has a precapillary sphincter before branching off.
Those are muscles as well.
The 600-800 answer , though being valid in a context , originates from the skeletal muscle answer , which used to be the general answer in the days before microscopes were common tools. Later other muscles got added , up to a point , but by now it's not a general answer anymore.
It's better to just specify "skeletal muscles" , especially in the question , since that's generally the answer that's being sought.
The general answer though .. "How many muscles do we have?" .. is a whole whole lot .
Posted by phoenixxl on November 9, 2011 at 3:32 PM (Answer #1)
The number of muscles in the human body varies from about 656 to 850, depending on which expert you consult. No exact figure is available because there are a variety of opinions about what constitutes a distinct muscle (versus a part of a complex muscle). Also, there is some variability in muscular structure between individuals.
There are three categories of muscle: skeletal, smooth, and cardiac. The skeletal muscles consist of striped or striated fibers. They move the various parts of the body. Skeletal muscles are considered "voluntary" muscles because the person controls their use.
The second category is smooth muscles. These muscles are found in the stomach and intestinal walls, vein and artery walls, and in various internal organs. Smooth muscles are called "involuntary" because they cannot be made to work by conscious choice, but are controlled by the autonomic nervous system.
Finally there are the cardiac muscles, which are only found in the heart. These muscles, which contain both striped and smooth tissue, are involuntary.
Sources: The American Medical Association Encyclopedia of Medicine, pp. 703-6; Brandreth, Gyles. Your Vital Statistics, p. 17; Cody, John. Visualizing Muscles, p. 5.
Posted by fact-finder on October 10, 2011 at 4:00 PM (Answer #2)
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Scientist estimate their are 640 or thereabouts.
Posted by overworked on June 18, 2012 at 7:37 AM (Answer #5)
Posted by television123 on June 22, 2012 at 8:38 AM (Answer #6)
Quiz Taker, Salutatorian, Quiz Maker
There are 640 muscles
Posted by adarshanurag on December 2, 2013 at 3:28 PM (Answer #11)
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656 to 850
Posted by joshuayen on October 20, 2011 at 12:55 PM (Answer #1)
Posted by enoteslearner on October 20, 2011 at 1:22 PM (Answer #2)
I am going to make an assumption (as the other responses probably did) that you are asking about skeletal muscles only.
As you may already know, there are different types of muscle tissue. Some examples are skeletal, cardiac and smooth/visceral as indicated in your tags.
Even anatomists will disagree as to the exact number of skeletal muscle because of differences in classification occurring mostly with several of the very small sized muscles.
The general consensus is about 640.
Posted by tollelege on October 23, 2011 at 7:12 AM (Answer #3)
Most people agree that there are about 640 muscles in the human body, while others may suggest that there are 639 muscles in the human body. The muscular system is composed of fibers and tissues that are responsible for the movements of the body. There are three different types of muscles– cardiac, smooth and striated.
Striated muscles can be also called skeletal or voluntary muscles. This group of muscles refers to muscles that the human body has control of. These include the muscles that are responsible for movement of the bones, and also include the facial muscles. Striated muscles are muscles that are the ones generally injured during physical activity or sports. The smooth muscles are involuntary and are controlled by the part of the human body known as the autonomic nervous system. These muscles are responsible for movement of internal organs such as the secretory glands and organs of the gastrointestinal tract.
The difference between cardiac muscles and striated muscles is that cardiac muscles make up the heart. These muscles work in conjunction to effectively pump blood throughout the body and back and forth from the heart. One of the busiest muscles in the human body are those located in the eye. These muscles are the muscles that are responsible for the blinking process, which is both an involuntary and voluntary reaction. The average person blinks about 100,000 every day. The stapedius muscle, located in the ear is considered the smallest muscle in the body. By contrast, the largest muscle in the body is the gluteus maximus, or otherwise known as the buttock. Now, when people ponder how many muscles there are in the human body, they will not only think about the number of muscles in the human body, but also how these muscles work. The muscles in the human body work in conjunction with each other to perform precise movements within the system. Sometimes, muscles of the human body can become overly taxed and cause muscle strain, however, with a few days rest, these hearty bunches usually bounce back, working better than ever.
Posted by agasmith96 on November 17, 2011 at 5:20 PM (Answer #7)
number of muscles of the human body is 639
Posted by muruganugcvel on January 7, 2012 at 2:55 PM (Answer #8)
there are approximately 640 skeletal muscles within a typical human and almost every muscle constitutes one part of a pair of identical bilateral muscles,found on both sides ,resulting in approximately 320 pairs of muscles .
Posted by hina0000 on January 26, 2012 at 5:51 PM (Answer #9)
The question here isn't how many skeletal muscles.. the question is how many muscles .
Don't be stuck in dogma people..
There is 1 answer here from someone that dares use his/her brain.
Posted by dorei on January 28, 2012 at 6:36 AM (Answer #3)
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