5.1_ Anatomy of the Muscular System_ Introduction & Muscles of the Head, Neck, and Trunk_ Essential

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8/20/20205.1: Anatomy of the Muscular System: Introduction & Muscles of the Head, Neck, and Trunk: Essential Human Anatomy and Physiology I…1/175.1: Anatomy of the MuscularSystem: Introduction & Muscles ofthe Head, Neck, and TrunkNotice:To optimize your learning in this course, we advise that you complete thelabs and modules as indicated in the BIOD 151 Lab Schedule.The muscular system and the skeletal system work together to provide movementfor the human body. Muscle tissue is found in three distinct types in the body;skeletal, smooth, and cardiac. Skeletal muscles must have a blood and nervoussupply to provide movement. Skeletal muscles are underconscious control,meaning that a person can consciously decide to use these muscles to complete anaction. Communication within the body to coordinate movement starts in the brainwith a message that is sent through the spinal cord and eventually attaches to amuscle.Peripheral nervescarry the signal from thecentral nervous system(brainand spinal cord) to a specific muscle destination to provide movement. Messagesfrom the central nervous system to a muscle are calledmotoractions. Nerves alsocarry information from the external environment to the central nervous system,called sensation orsensoryinput (seeFigure 5.1andFigure 5.2). Spinal nervescombine to form complex networks of peripheral nerves throughout the body.
8/20/20205.1: Anatomy of the Muscular System: Introduction & Muscles of the Head, Neck, and Trunk: Essential Human Anatomy and Physiology I…2/17Figure 5.1 Posterior view of the nervous system.The brain and spinal cord(central nervous system) connect to the peripheral nervous system. Examples ofperipheral nerves are spinal nerves (cervical, thoracic, and lumbar), the upper trunkof the brachial plexus, and the radial nerve.
8/20/20205.1: Anatomy of the Muscular System: Introduction & Muscles of the Head, Neck, and Trunk: Essential Human Anatomy and Physiology I…3/17Figure 5.2Peripheral nerves carry the communication from the central nervoussystem (brain and spinal cord) to the muscle. Peripheral nerves also carryinformation from the environment to the central nervous system.Tendonsare connective tissues that connect skeletal muscle to bone at each end(seeFigure 5.3). Tendons are flexible, can bend at the joints, and help cushionagainst sudden movement.Ligamentsare connective tissue that connects bone tobone, helping to stabilize joints where bones meet.
8/20/20205.1: Anatomy of the Muscular System: Introduction & Muscles of the Head, Neck, and Trunk: Essential Human Anatomy and Physiology I…

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