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What is 1 + 3?
makes up the main axis of our body
(head, neck, trunk)
consists of the appendages/limbs that are attached to the axis
toward the head end/upper part of the body
away from the head/lower part of the body
toward the front of the body
toward the back of the body
toward the midline of the body
away from the midline of the body
between the medial and lateral structure of the body
closer to the origin of the body part
farther from the origin of a body part
toward the body surface
away from the body surface