Still in academic importance today are skeletal descriptions, as well as those of the blood vessels, mor-phology of internal organs ,circulation ,and blood physiology. Contributions providing an understanding of the multiple functions of zang-viscera and fu-viscera in physiology are great, as are information regarding the integral relationship within physiology and pathology.

Anoter classic still plays an important role in present day clinical practice is the Cla-ssic on Medical Problems which appeared before the Han Dynasty. It expounded on and supplemented the difficult questions posed by the Yellow Empiror's Internal Classic and was a contribution to the basic theory of TCM. Throughout the Han Dynasty, TCM made even further progress.

Using as a foundation the Yellow Emperor's Internal Classic and the Classic on Medical Problems, an outstanding physician, Zhang Zhongjing, wrote the first clinical medicine treatise during the Easterm Han Dynasty (150-219 A. D. )Treatise on Cold-Attack and Miscellaneous Diseases, and he further expounded upon the medical achievements of his forefathers while integrating his own clinical experience. Within the treatise, a system of treatment based on syndrome differentiation and the principles of medical theory, therapeutic methods, prescriptions and medication in clinical practice was established.

Arising from his methods of analyzing and differentiating exogenous diseases and in-ternal miscellaneous diseases in accordance with the six pairs of meridians and eight princi-ples, was a solid foundation for the development and future abundance of clinical Chinese medicine. The Treatise on Cold-attack and Miscellaneous Diseases was subsequently re-arranged by Wang Shuhe and divided into two books: The Treatise on Cold-Attack, and Synopsis of Prescriptions of the Golden Chamber. The former included 397 diagnostic and therapeutic methods, and 113 prescriptions ; the latter listed 25 volumes and 265 pre-scriptions.

The Synopsis of Prescriptions of the Golden Chamber put forward: "There are only three causes for all diseases: the first, exogenous cause, is that the evils invaded from the mericlians transmit into the viscera; the second is that the evils invaded from the four limbs and nine orifices transmit into the blood vessel and result in stasis and stagnancy; the third consists of such pathogenic factors as sexual indulgence, bites by insects and beasts, and trauma, "This text further advanced the etioloical theory in the Yellow Emperor's Internal Classic by analyzing the symptoms and signs according to the patho-logical mechanism, theory of zang-viscera and fu-viscera.

Another text A-B Classic of Acupuncture and Moxibustion Written by Huang Fumi, afamous physician in Jin Dy-nasty, also offered a deeper understanding of the meridian theory. The Pulse Classic, is a text by Wang Shuhe and summarizes the 24 kinds of pulse conditions and their related principal diseases, which made a contribution to the development of Chinese traditional Sphygmology.