<P> Muscle tissue is a soft tissue, and is one of the four fundamental types of tissue present in animals . There are three types of muscle tissue recognized in vertebrates: </P> <Ul> <Li> Skeletal muscle or "voluntary muscle" is anchored by tendons (or by aponeuroses at a few places) to bone and is used to effect skeletal movement such as locomotion and in maintaining posture . Though this postural control is generally maintained as an unconscious reflex, the muscles responsible react to conscious control like non-postural muscles . An average adult male is made up of 42% of skeletal muscle and an average adult female is made up of 36% (as a percentage of body mass). </Li> <Li> Smooth muscle or "involuntary muscle" is found within the walls of organs and structures such as the esophagus, stomach, intestines, bronchi, uterus, urethra, bladder, blood vessels, and the arrector pili in the skin (in which it controls erection of body hair). Unlike skeletal muscle, smooth muscle is not under conscious control . </Li> <Li> Cardiac muscle (myocardium), is also an "involuntary muscle" but is more akin in structure to skeletal muscle, and is found only in the heart . </Li> </Ul> <Li> Skeletal muscle or "voluntary muscle" is anchored by tendons (or by aponeuroses at a few places) to bone and is used to effect skeletal movement such as locomotion and in maintaining posture . Though this postural control is generally maintained as an unconscious reflex, the muscles responsible react to conscious control like non-postural muscles . An average adult male is made up of 42% of skeletal muscle and an average adult female is made up of 36% (as a percentage of body mass). </Li> <Li> Smooth muscle or "involuntary muscle" is found within the walls of organs and structures such as the esophagus, stomach, intestines, bronchi, uterus, urethra, bladder, blood vessels, and the arrector pili in the skin (in which it controls erection of body hair). Unlike skeletal muscle, smooth muscle is not under conscious control . </Li>

Where is most of the muscle weight found in humans