The internal structure of the human body is complex and exquisite. According to the theory of traditional Chinese medicine, the internal structure of the human body is composed of twelve organs and twelve meridians. These twelve zang organs include the five zang organs, six zang organs, and three jiao organs, which cooperate and work together to maintain the life activities of the human body.
The meridian system is an important component of the human body, which is a complex and organic whole. As a subsystem of the meridian system, the twelve meridians have important significance in their division within the human body. By partitioning, it is possible to have a clearer understanding of the relationship between the viscera and meridians, as well as the positions and functions of different meridians in the human body.
Specifically, the twelve meridians in the human body are divided into two hand and foot three yin meridians and three hand and foot three yang meridians. These meridians are connected to different organs, with the hand and foot three yin meridians mainly connected to the five organs, while the hand and foot three yang meridians mainly connected to the six organs and three jiao. These meridians are not isolated in the human body, but interconnected and influenced each other, collectively forming a complete meridian system.
人体内部的结构复杂而精妙，按照传统中医学的理论，人体的内部结构是由十二脏腑和十二经络所构成的。这十二脏腑包括了五脏六腑以及三焦，它们相互配合，协同工作，共同维持着人体的生命活动。

经络系统是人体内的一个重要组成部分，它是一个复杂的、有机联系的整体。十二经络作为经络系统下的子系统，其在人体内的分区有着重要的意义。通过分区，可以更加明确地了解脏腑与经络之间的联系，以及不同经络在人体上的位置和作用。

具体来说，十二经络在人体上的分区包括了两条手足三阴经和三条手足三阳经。这些经络分别与不同的脏腑相连接，其中手足三阴经主要与五脏相连接，而手足三阳经则主要与六腑以及三焦相连接。这些经络在人体上的分区并不是孤立的，而是相互贯通、相互影响，共同构成了一个完整的经络系统。