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

   www.britannica.com/science/human-muscle-system

   The following sections provide a basic framework for the understanding of gross human muscular anatomy, with descriptions of the large muscle groups and their actions. The various muscle groups work in a coordinated fashion to control the movements of the human body.

3. Human body | Organs, Systems, Structure, Diagram, & Facts -...

   www.britannica.com/science/human-body

   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.

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

   www.britannica.com/science/human-body-systems-2237111

   The muscle and skeletal systems, for example, act together to move the body. The skeletal system also protectively houses internal organs, such as the brain, heart, and lungs, while the muscle system aids in breathing and interacts with the nervous system to coordinate sensory and muscle responses.

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

   www.britannica.com/science/human-skeleton

   Human skeleton, the internal skeleton that serves as a framework for the body. This framework consists of many individual bones and cartilages. There also are bands of fibrous connective tissue—the ligaments and the tendons—in intimate relationship with the parts of the skeleton.

6. Muscle | Systems, Types, Tissue, & Facts | Britannica

   www.britannica.com/science/muscle

   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.

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

   www.britannica.com/science/human-muscle-system/The-shoulder

   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), and the scapula. The shoulder’s main motions are flexion, extension, abduction, adduction, internal rotation, and external rotation. Shoulder flexion is movement of the ...