athe swelling curves in the lower part of the back, which extend to form the arms, provide good lumbar support. 膨胀曲线在后面的低部,延伸形成胳膊,提供好腰椎。 [translate] async issues sync问题 [translate] apotent 正在翻译,请等待... [translate] aHello,thanks for the reply. I really want...
Sacrum, wedge-shaped triangular bone at the base of the vertebral column, above the caudal (tail) vertebrae, or coccyx, that articulates (connects) with the pelvic girdle. In humans it is usually composed of five vertebrae, which fuse in early adulthood.