sacrum
Sign in to saveThe sacrum (: sacra or sacrums), in human anatomy, is a triangular bone at the base of the spine that forms by the fusing of the sacral vertebrae (S1S5) between ages 18 and 30.
AI overview
The sacrum is a triangular bone located at the base of your spine that forms when five separate vertebrae fuse together during your late teens and twenties. It serves as a crucial connector between your spine and pelvis, providing structural support for your upper body and protecting the nerves that pass through it.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Bone.Name
- Sacrum
- Bone.Latin
- os sacrum
- Bone.Image
- Sacrum - anterior view04.png
- Bone.Caption
- Position of the sacrum in the pelvis
- Bone.Image2
- Sacrum - animation00.gif
- Bone.Caption2
- Animation of the sacrum in the human skeleton
- Bone.Location
- Base of the vertebral column
- Bone.Pronunciation
- ( or )
via Wikipedia infobox
Article
16 sectionsContents
- Structure
- Promontory
- Surfaces
- Articulations
- Variations
- Development
- Clinical significance
- Congenital disorders
- Fracture
- Cancer
- Other animals
- Terminology
- Additional images
- See also
- References
- External links
The sacrum (: sacra or sacrums), in human anatomy, is a triangular bone at the base of the spine that forms by the fusing of the sacral vertebrae (S1S5) between ages 18 and 30.
The sacrum situates at the upper, back part of the pelvic cavity, between the two wings of the pelvis. It forms joints with four other bones. The two projections at the sides of the sacrum are called the alae (wings), and articulate with the ilium at the L-shaped sacroiliac joints. The upper part of the sacrum connects with the last lumbar vertebra (L5), and its lower part with the coccyx (tailbone) via the sacral and coccygeal cornua.