Not really as they are fused into what is effectively one bone.
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Answer by Puhlaa:
While a child the sacral vertebrae are joined by disks similar to those of the rest of the spine, giving the sacrum some flexibility. This becomes especially important for a child while learning to walk, as frequent falls on the bum could fracture a solid sacrum/coccyx. The sacral vertebrae begin to fuse at around 18 years of age, and are completely fused by 25-30 years of age. Thus, the above answer would indeed be correct if in reference to an adult older than 30. Otherwise, if in reference to a person under 25, indeed the sacral vertebrae would allow for some limited flexion and extension.
The median sacral crest on the sacrum is a bony ridge formed by fusion of sacral vertebrae, indicating where the individual vertebrae once were. In contrast, the median sacral crest on lumbar vertebrae does not exist, as lumbar vertebrae do not fuse in the same way as sacral vertebrae.
Overall, sacral vertebrae problems are not common in horses. However, it is possible for the sacral vertebrae to become fractured, dislocated or infected, all of which can compress the pelvic limb spinal nerves that run through the sacral vertebrae.
Six
21
The lumbar vertebrae come next, followed by the sacral.
the sacral vertebrae, and think it's 4 to 5 that are fused together
sacrum and coccyx
A sacral vertebra is one of the bones in the spine located in the lower back, just below the lumbar vertebrae. There are typically five sacral vertebrae that are fused together to form the sacrum, which connects the spine to the hip bones. The sacral vertebrae play a role in supporting the weight of the body and protecting the spinal cord.
sacral hiatus
The five types of vertebra are the:cervical vertebrae (neck)thoracic vertebrae (chest)lumbar vertebrae (back)sacral (pelvis)coccyx (tailbone)
There are Five different types of Vertebrae in the Vertabral collumn (spine).1) Cervical Vertebrae (7)2) Thoracic Vertebrae (12)3) Lumbar Vertebrae (5)4) Sacral Vertebrae (5)5) Coccygeal Vertebrae (3)
kyphosis, lordosis and scoliosis