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  • Human muscle system | Functions, Diagram, Facts | Britannica
    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 balance Broadly considered, human muscle—like the muscles of all vertebrates—is often divided into striated muscle, smooth muscle, and cardiac muscle
  • Muscle | Systems, Types, Tissue, Facts | Britannica
    In humans the muscle systems are classified by gross appearance and location of cells The three types of muscles are striated (or skeletal), cardiac, and smooth (or nonstriated) Striated muscle is almost exclusively attached to the skeleton and constitutes the bulk of the body’s muscle tissue
  • human muscle system Facts | Britannica
    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 balance Broadly considered, human muscle—like the muscles of all vertebrates—is often divided into striated muscle, smooth muscle, and cardiac muscle
  • Human body | Organs, Systems, Structure, Diagram, Facts | Britannica
    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 in adults), moves the body and protectively houses its internal organs
  • Human muscle system - Abdominal Muscles, Anatomy, Function | Britannica
    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 The fourth layer in the midregion is the rectus abdominis, which has vertically running muscle fibres that flex the trunk and stabilize the pelvis
  • Skeletal muscle | Definition Function | Britannica
    skeletal muscle, in vertebrates, most common of the three types of muscle in the body Skeletal muscles are attached to bones by tendons, and they produce all the movements of body parts in relation to each other Unlike smooth muscle and cardiac muscle, skeletal muscle is under voluntary control Similar to cardiac muscle, however, skeletal
  • How the Brain Controls Voluntary and Involuntary Muscle Movements . . .
    Voluntary muscles are controlled by the motor cortex, while involuntary muscles are controlled by other regions of the brain such as the hypothalamus
  • Human nervous system - Motor, Sensory, Reflex | Britannica
    Human nervous system - Motor, Sensory, Reflex: Movements of the body are brought about by the harmonious contraction and relaxation of selected muscles Contraction occurs when nerve impulses are transmitted across neuromuscular junctions to the membrane covering each muscle fiber
  • Pectoralis muscle | Definition, Location, Function, Facts - Britannica
    pectoralis muscle, any of the muscles that connect the front walls of the chest with the bones of the upper arm and shoulder There are two such muscles on each side of the sternum (breastbone) in the human body: pectoralis major and pectoralis minor





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