Final answer:
The Chinese learned about how the human body works through the study of human anatomy, observing both external and internal structures.
Step-by-step explanation:
The Chinese learned about how the human body works through the study of human anatomy. For thousands of years, anatomists and physicians in China studied the external structures of the body and observed injuries to gain knowledge about its function and diseases. Later, they were allowed to dissect bodies of the dead, further enhancing their understanding of internal anatomy. Today, various imaging techniques are used to observe structures inside the living body.