Wednesday, 15 October 2014


In people, the sacrum is an expansive, triangular bone at the base of the spine and at the upper, back piece of the pelvic depression, where it is embedded like a wedge between the two hip bones. Its upper part join with the last lumbar vertebra, and its lower part with the coccyx (tailbone). Typically, it starts as five unfused vertebrae which start to breaker between the ages of 16–18 years and have normally totally combined into a solitary bone by the age of 34 years.

The sacrum has three separate surfaces which are formed to suit different structures. It explains with four different bones. It is bended upon itself and put sideways (tilted forward). It is inward, confronting forward. The base activities forward as the sacral projection inside, which is the superiormost bit of the sacrum. The focal part is bended outward at the back, permitting more noteworthy space for the pelvic pit. The two parallel projections of the sacrum are known as the alae (wings), and eloquent with the ilium at the L-molded sacroiliac joints.

The sacral vertebrae create before the end of the first month of embryonic advancement, the higher vertebrae having created first. There are inborn issue that create in the early phases of fetus.

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