Sacrum The number of sacral vertebrae varies slightly. For instance, the S1S5 vertebrae of a horse will fuse, the S1S3 of a dog will fuse, and four pelvic vertebrae of a rat will fuse between the lumbar and the caudal vertebrae of its tail. The "Stegosaurus" dinosaur had a greatly enlarged neural canal in the sacrum, characterized as a "posterior brain case”. The sacrum is a complex structure providing support for the spine and accommodation for the spinal nerves. It also articulates with the hip bones. The sacrum has a base, an apex, and three surfaces – a pelvic, dorsal and
The White Bone the novel are mostly from the "She-S" family, into which Mud, a young cow who is pregnant with her first calf, has been adopted. Mud is blessed with visionary powers and can occasionally see into the future. Thrown into a drought, with human poachers becoming increasingly common, Mud and her family must find the legendary "Safe Place" where drought and poachers do not come. The "White Bone," a rib of a newborn elephant, is rumored to be lying somewhere in the savannah and is said to point in the direction of the Safe Place. After a slaughter which leaves most