Sacrum lumbar vertebra, and its lower part with the coccyx (tailbone) via the sacral and coccygeal cornua. The sacrum has three different surfaces which are shaped to accommodate surrounding pelvic structures. Overall it is concave (curved upon itself). The base of the sacrum, the broadest and uppermost part, is tilted forward as the sacral promontory internally. The central part is curved outward toward the posterior, allowing greater room for the pelvic cavity. In all other quadrupedal vertebrates, the pelvic vertebrae undergo a similar developmental process to form a sacrum in the adult, even while the bony tail (caudal) vertebrae remain unfused.
Sacrum bone of Tequixquiac Sacrum bone of Tequixquiac The Sacrum bone of Tequixquiac is an ancient paleo-Indian sculpture carved in a pleistocene-era bone of a prehistoric camel. It was found by Mexican naturalist Mariano Bárcena in 1870. It is considered among the earliest pieces of art from the American continent. A sacrum bone found in Tequixquiac is considered a work of prehistoric art. These people were nomadic, hunting large animals such as mammoths and gathering fruits as evidenced by archaeological evidence found at the site. One of the most salient discoveries of primitive art in America was found here, called the Sacrum bone of