Charaka Samhita is an Indian text on ancient medicine. It was written by Charaka, a renowned doctor of ancient India.

The book is divided into two parts. The first part contains basic information about ancient medicine, and the second part contains detailed information about various topics.

In the first part, Charaka describes the basic concepts of ancient medicine. He states that the human body has a unique structure and that the various organs are connected to each other. Each of the organs has a specific function, and each function is responsible for the maintenance of the health of the organism.

In addition, the body has a certain amount of energy, and if the energy is not utilized, the body will suffer from a number of ailments.

The main concepts that Charaka describes in the first part of the book are the anatomy of the human body, the various organs, and the functions of the various organs.