Plural of aponeurosis; flat, sheet-like fibrous structures that attach muscles to bones or other parts, serving as tendons or fascia.
From Greek apo- 'away from' + neuron 'sinew' + -osis (condition) + plural -es. This medical term refers to the fibrous tissue that extensions from muscles.
Aponeuroses are like biological fabric sheets spread throughout your body—they let muscles exert force over a wider area than if they just used thick cords, which is why you can make fine facial expressions without looking like a robot.
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