This is an example of the detail orientation and the level of specialization reached in those ancient times.
Not only this, Sushruta, the father of surgery, who has compiled the shalya tantra made the most valuable contribution of plastic surgery in form of rhinoplasty, labioplasty and suturing deformed ear pinna. Minute and detailed explanations of the layers of skin and several other aspects were also explained by Sushruta.
Ayurveda is not just a complementary and alternative system of medicine, but it is a way of life. It is the oldest science of medicine which has a lineage as old as 5000 years. It was passed to the generations through vocal communication only, which eventually lead to gradual loss of valuable information and distortion in the original contents.
But facing all adversaries, it has managed not only to survive through the rages of time but also maintained its accuracy and efficacy in providing healthy lives to individuals.