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  1. Human muscle system | Functions, Diagram, & Facts | Britannica

    Nov 24, 2025 · Human muscle system, the muscles of the human body that work the skeletal system, that are under voluntary control, and that are concerned with movement, posture, and …

  2. Human body | Organs, Systems, Structure, Diagram, & Facts

    Nov 1, 2025 · The musculoskeletal system (also referred to separately as the muscle system and the skeletal system), composed of the skeletal muscles and bones (with about 206 of the latter …

  3. Human muscle system - Abdominal Muscles, Anatomy, Function

    Nov 24, 2025 · Human muscle system - Abdominal Muscles, Anatomy, Function: There are three muscular layers of the abdominal wall, with a fourth layer in the middle anterior region.

  4. Human body systems | Muscle, Skeletal, Respiratory, Circulatory ...

    Each of the major systems of the body is essential to the survival of the human organism, and each serves as a critical companion to the others. The muscle and skeletal systems, for …

  5. Cardiac muscle | Definition, Function, & Structure | Britannica

    Cardiac muscle possesses contractile units known as sarcomeres and exhibits rhythmic contractions. The rhythmic contractions are regulated by the sinoatrial node of the heart and …

  6. Skeletal muscle | Definition & Function | Britannica

    For more information on the structure and function of skeletal muscle, see muscle and muscle system, human. This article was most recently revised and updated by Adam Augustyn.

  7. Human muscle system - Shoulder Muscles, Joints, Movements

    Nov 24, 2025 · Human muscle system - Shoulder Muscles, Joints, Movements: The shoulder is a complex ball-and-socket joint comprising the head of the humerus, the clavicle (collarbone), …

  8. Muscle - Types, Structure, Function | Britannica

    Oct 10, 2025 · The principal types of muscles are striated muscle, in which the filaments are organized in transverse bands as in Figure 2; obliquely striated muscle, in which the filaments …

  9. Human skeleton | Parts, Functions, Diagram, & Facts | Britannica

    Oct 11, 2025 · The third general function of the skeleton is that of motion. The great majority of the skeletal muscles are firmly anchored to the skeleton, usually to at least two bones and in …

  10. Smooth muscle | anatomy | Britannica

    Smooth muscle, muscle that shows no cross stripes under microscopic magnification. It consists of narrow spindle-shaped cells with a single, centrally located nucleus.