Introduction to the Muscular System - Animated Tutorial

three types of muscles are contained within the human body smooth cardiac and skeletal muscles smooth muscles are found in the walls of many organs such as the stomach and in blood vessels they have a non-serrated appearance and contract involuntarily cardiac muscles are found in the walls of the heart they also contract involuntarily but have a striated appearance skeletal muscles are attached to and move bones these muscles contract voluntarily and have it's created pairs skeletal muscles are sub categorized

into four distinct groups based on the orientation and arrangement of their muscle fibers parallel skeletal muscles consists of fibers that are arranged in parallel to the line of pull during contraction parallel muscles can be so categorized based on their shape into quadrilateral strap lake and fusiform convergent muscles contain fibers that have a wide origin but converge in order to attach to a narrow tendon circular skeletal muscles are made up of fibers that are arranged in a circular manner there are founded points both