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The muscular system is an organ system consisting of skeletal, smooth, and cardiac muscle. It permits movement of the body, maintains posture, and circulates blood throughout the body. [1] The muscular systems in vertebrates are controlled through the nervous system although some muscles (such as the cardiac muscle) can be
Mesomorphs tend to have a naturally athletic and muscular build, with larger bone structures and well-defined muscles. Their core-strengthening goals might revolve around enhancing muscle ...
Muscles may also be described by the direction that the muscle fibres run, in their muscle architecture. Fusiform muscles have fibres that run parallel to the length of the muscle, and are spindle-shaped. [19] For example, the pronator teres muscle of the forearm. Unipennate muscles have fibres that run the entire length of only one side of a ...
These muscles have broad attachments compared to other muscle types and can shorten to about 40–60% of their resting length. [ 3 ] [ 4 ] Strap muscles, such as the laryngeal muscles , have been thought to control the fundamental frequency used in speech production, as well as singing. [ 5 ]
"The pressure for male athletes to have well-defined muscles, minimal body fat and a physique that conveys strength, power and athleticism can lead to maladaptive behaviors that put an athlete's ...
It is well known that the Homo sapiens line of primates developed the opposable thumb which opened the door to many muscle functions not yet possible in the hand and other upper body regions. [7] The stretching muscles of the forearms whose tendons allowed the human to concentrate its force and abilities within his/her hands and fingers ...
Muscle fibers grow when exercised and shrink when not in use. This is due to the fact that exercise stimulates the increase in myofibrils which increase the overall size of muscle cells. Well exercised muscles can not only add more size but can also develop more mitochondria, myoglobin, glycogen and a higher density of capillaries. However ...
The general shape or figure of a person is defined mainly by the molding of skeletal structures, as well as the distribution of muscles and fat. [1] Skeletal structure grows and changes only up to the point at which a human reaches adulthood and remains essentially the same for the rest of their life.