Dictionary of Human Evolution and Biology

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Body Segment

1. division of the body into regions, or body regions into components. Gross segments are the head, neck, trunk, upper limbs, and lower limbs. Most of these segments can be further subdivided: for example, the lower limbs consists of the thigh, lower leg, and foot.

2. one of the regions of the body in relation to the ancestral muscle arrangements in vertebrates. Vertebrate segmentation is limited (for example, the skin is not segmented) and the segmented arrangement is principally of the trunk muscles, skeleton, and nervous system.

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