How many muscles are there in the human body?
There is no universally agreed definition of what a skeletal
muscle is, so there are differences of opinion as to where one
muscle ends and another begins, hence the variation in numbers.
There are also several small skeletal muscles in the human body
that may or may not be present in certain individuals due to
genetic factors. For example the palmaris longus muscle is not
present in approximately 14% of the population, and the peroneus
quartus is a muscle rarely found in the human body.
There is also another kind of muscle called smooth muscle, which
cannot be consciously controlled. It's near impossible to say how
many smooth muscles there are in the body since they can vary in
size greatly and are not exactly easy to count.
There are three types of muscles smooth, skeletal, and cardiac.
The cardiac and smooth are involuntary meaning you do not have to
think about them to work. Skeletal which as you can guess move your
skeleton are voluntary meaning you have to think about moving them
before they move.
Humans have between 650 and 850 muscles in their body. The range
of numbers is due to debate over muscle classification. Some
experts count 650 due to grouping related small muscles with the
same origins. Other experts believe the number is as high as 850
because each individual movement the muscles create.