The study of the body by systems is known as what?

The study of the body by systems is referred to as systemic anatomy. This approach involves examining the various systems within the body, such as the circulatory system, respiratory system, and nervous system. Each system is studied in detail to understand its structure, function, and interrelationships with other systems. Systemic anatomy allows for a comprehensive view of how different body parts work together to maintain homeostasis and overall health.

In contrast, systemic physiology focuses on the functions of these systems rather than their structures, while functional anatomy looks at the anatomical features in relation to their functions. Comparative anatomy, on the other hand, studies the similarities and differences in the anatomy of different species, which is not specifically aligned with the study of human body systems. Thus, systemic anatomy is the correct term for the systematic examination of the body's structures organized by systems.