Which ancient text is known for describing the circulation of blood?

The Huang-ti Nei Ching, also known as the Yellow Emperor's Inner Canon, is recognized for its foundational contributions to traditional Chinese medicine, particularly regarding the understanding of the human body and various medical practices. This ancient text is particularly noteworthy because it discusses the principles of blood circulation and the interaction between different bodily systems.

It serves as a significant reference in the history of medicine, as it not only describes the flow of blood but also illustrates the concepts of vital energy (Qi), meridians, and the balance of Yin and Yang within the body. These principles laid the groundwork for many aspects of Traditional Chinese Medicine that are still practiced today. By focusing on blood circulation, the text emphasizes the importance of maintaining a balanced and harmonious internal environment, which is crucial for overall health.

In contrast, the other options, while they may hold significance in traditional medical practices or philosophies, do not focus on blood circulation in the same profound context as the Huang-ti Nei Ching does. Therefore, this text stands out as a landmark work in the understanding of blood circulation and its vital role in health.