Muscles and movement

Topic 11.2

11.2.1: Structures involved in movement

The table below outlines the roles of bones, ligaments, muscles, tendons and nerves in movement.

Structure Role
Bones Enable body movements by acting as levers and points of attachment for muscles.
Ligaments Connect bone to bone.
Muscles To generate a force.
Tendons Connect muscles to bone.
Nerves Stimulate the contraction of muscles.

11.2.2 & 11.2.3: The human elbow

The figure below is an xray of the human elbow. Placing your mouse pointer on the figure below will show the structures of the elbow.

Structure of the human elbow

11.2.4: Comparing the movement of the hip to the knee

Comparing the movement of the hip to the knee

11.2.5 & 11.2.6: Structure of striated muscle

Structure of striated muscle

Placing your mouse pointer on the figure below will show the actin and myosin myofilaments.

Click on the image to show the z-line, dark and light bands and then double click on the image to return to the actin and myosin filaments.

Structure of the human elbow

11.2.7: What are the events involved in skeletal muscle contraction?

muscle link muscle animation
Show explanation skeletal muscle contraction | Hide explanation skeletal muscle contraction
Sliding filament theory

11.2.8: Is this muscle relaxed or contracted?

Contracted striated muscle
Show explanation for relaxed or contracted | Hide explanation for relaxed or contracted
Sliding filament theory
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