Preliminary findings:
There are several sources of hair growth: proliferating cells of the bulb; cells (transient) released from capsule-free globular structures inside the hair shaft. Inside the spherical structure, the formation of future cell components (primarily - its nuclear component) takes place.
A brief conclusion on "spherical" structures.
The previously unknown phenomenon of cell replication inside the spherical supracellular structures has been established, which consists in the fact that when signals of physical, chemical and biological origin are received, the mechanisms of cell replication of different levels of differentiation (stem and transient) are activated inside these spherical structures by means of activation of genetic material included at the stage of embryonic development or introduced by means of entosis, with the formation of multiple cellular structures involved in long-range cellular development. Separate and less studied areas of research are "capsule structures" and "crystal structures", which are also involved in regeneration.