Final answer:
The study of pruritus anatomy and physiology focuses on the nervous system, examining the complex pathways through which itching sensation is perceived and processed by the body.
Step-by-step explanation:
The anatomy and physiology of pruritus are primarily a study of the nervous system. Pruritus, commonly referred to as itching, involves complex neural pathways that include the skin's sensory neurons, the spinal cord, and the brain where the sensation is processed. It is a sensation that can provoke the behavioral response to scratch. The nervous system's role in pruritus goes beyond the transmission of signals; certain chemical mediators released in the skin can also stimulate nerve endings, and internal conditions such as diseases or drug reactions can give rise to pruritus as well. Therefore, when considering what the anatomy and physiology of pruritus study, the correct answer is B) Nervous system.