The horse has around 54 vertebrae that form the horses spine.
The 7 cervical vertebrae form the neck, which has great flexibility.
The 18 thoracic vertebrae, that form the wither and the part behind it have long processes. They can be up to 30 cm long.
The 6 lumbar vertebrae have spinal and transverse processes (wings).
The 5 sacral vertebrae are fused to the sacrum. The sacroiliac joins the spine at the sacrum to the pelvis. There is only very little movement possible in the sacroilliac joint.
The 15-21 caudal verrtebrae form the tail of the horse.