the sacral vertebrae, and think it's 4 to 5 that are fused together
There are typically 33 vertebrae in the human spine: 7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, 5 sacral vertebrae (fused into the sacrum), and 4 coccygeal vertebrae (fused into the coccyx).
The 33 vertebrae in the human spine are divided as follows: 7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, 5 sacral vertebrae (fused into the sacrum), and 4 coccygeal vertebrae (fused into the coccyx).
The last 4 fused vertebrae in the spine are called the sacrum. The sacrum is a triangular bone located below the lumbar vertebrae and is formed by the fusion of five sacral vertebrae.
No, the coccyx is smaller. The coccyx is formed by fused vertebrae.
The medical term for the five fused vertebrae above the tailbone is the sacrum.
There are 7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, the 5 sacral vertebrae fused to form the sacrum, and the 4 coccygeal vertebrae fused to form the coccyx. Depending on the way you count the number of bones, it comes to as few as 26 bones (just the fused sacrum and fused coccyx are counted) or 33 bones (if you count each bone that is fused).
sacrum and coccyx
The four vertebrae that are fused together are the sacral vertebrae, specifically S1 to S5, which form the sacrum. This fusion provides stability and support to the pelvis and the spine, playing a crucial role in weight-bearing and movement. In some individuals, the coccygeal vertebrae can also be fused, forming the coccyx or tailbone.
The human spine consists of 33 individual vertebrae, categorized into five regions: cervical (7 vertebrae), thoracic (12 vertebrae), lumbar (5 vertebrae), sacral (5 fused vertebrae), and coccygeal (4 fused vertebrae). Each pair of vertebrae in the cervical, thoracic, and lumbar regions is separated by intervertebral discs that provide cushioning and allow for movement. The sacral vertebrae are fused to form the sacrum, while the coccygeal vertebrae form the coccyx, or tailbone. Together, these vertebrae protect the spinal cord and support the body's structure.
Sacrum
The vertebrae at the end of the spine are fused to form the coccyx (tailbone).
The five fused vertebrae with which the hip bones move are collectively known as the sacrum. The sacrum forms the posterior wall of the pelvis and connects the spine to the hip bones, providing stability and support for the body.