Tulang tonggong: Béda antarrépisi

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The thoracic portion of the vertebral column also has a slight lateral curvature, the convexity of which is directed toward the right side. This may be produced by muscular action, most persons using the right [[arm]] in preference to the left, especially in making long-continued efforts, when the body is curved to the right side. In support of this explanation it has been found that in one or two individuals who were left-handed, the convexity was to the left side. This curvature is regarded by others as being produced by the [[aortic arch]] and upper part of the [[descending aorta|descending thoracic aorta]] – a view which is supported by the fact that in cases of [[situs inversus]] where the [[viscera]] are transposed and the aorta is on the right side, the convexity of the curve is directed to the left side.
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[[Gambar:Spinal column curvature-en.pngsvg|thumb|150pxupright=0.8|Babagian (kurvatur) tulang tonggong]]
=== Ngaran-ngaran vertebrae ===
Unggal vertebrae dingaranan luyu jeung perenahna, ti luhur ka handap