A cat’s tail is an extension of its spine. Tails are vertebrae, which are made of blood cells, nerves, muscles, and scent glands. The bones that make up a cat’s tail are known as caudal vertebrae.

In the course of tail regeneration, a cartilaginous tube encapsulates the regenerated spinal nerves and is covered by muscle and skin. Lozito and Tuan found that differentiation at both ends of this ...