Sacrum facts for kids
| Bone: Sacrum | ||
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| Sacrum, pelvic surface | ||
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| Image of a male pelvis (sacrum is in center) | ||
| Latin | Os sacrum | |
In humans, the sacrum is a large, triangular bone. It is at the bottom of the spine and the upper and back part of the pelvis.
It fits like a wedge between the two hip bones. Its upper part connects with the last lumbar vertebra, and bottom part with the coccyx (tailbone). During the first half of life these bones gradually fuse together.
The sacrum is concave facing forward, and tilted forward. The sacrum connects with four bones:
- the last lumbar vertebra above
- the coccyx (tailbone) below
- the illium portion of the hip bone on either side
Images for kids
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Pelvic surface
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Dorsal surface
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Lateral surface
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Image of a female pelvis seen anteriorly, sacrum at centre.
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Lateral surfaces of sacrum and coccyx.
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Base of sacrum.
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Median sagittal section of the sacrum.
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Left levator ani from within.
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The posterior divisions of the sacral nerves.
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Sacrum. Pelvic surface.
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Sacrum. Dorsal surface.
See also
In Spanish: Sacro (hueso) para niños
