Final answer:
A dead human body used for anatomical and scientific study is known as a cadaver. Cadavers have played a significant role in the advancement of medical education through dissection and the study of the body's structures. The correct option is a.
Step-by-step explanation:
The dead human body used for anatomical and scientific study is referred to as a cadaver. Human anatomy, which comprises both the dissection of anatomical structures of cadavers and modern imaging techniques, is the scientific study of the body's structures. Cadavers have been essential for medical students and researchers to understand the physical attributes and relationships of the body's structures throughout history. Dissection has been a cornerstone of medical education, and to this day, it remains a critical component of anatomy courses and pathology labs.
Laws enabling the dissection of criminals' corpses and the donated bodies of the deceased for research have facilitated advancements in medical knowledge. Prior to these developments, external observation and imagination were the primary sources of anatomical information due to legal and societal limitations on studying the human body's internal structures.