Final answer:
The action of pectinius is a muscle in the human body that assists in flexing the hip joint and adduction of the thigh.
Step-by-step explanation:
The action of pectinius is a muscle in the human body that belongs to the group of hip flexors. This muscle is located in the upper thigh region and helps in the movement of the hip joint. Pectinius assists in flexing the hip joint by pulling the thigh bone (femur) towards the pelvis. It also aids in adduction, which is the movement of the thigh towards the midline of the body.
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