What is the study of functions and activities performed by the body structures?

• A. Physiology
• B. Pathology
• C. Anatomy
• D. Histology

Answer: (C)

Physiology is the study of how the body’s parts work—their functions, processes, and how they interact to keep the body alive and healthy. It asks questions about how hair follicles grow, how sebaceous glands secrete oil, how the skin regulates temperature, and how nerves coordinate sensation and movement. Anatomy, by contrast, looks at the structures themselves—their shape, location, and relationships. Histology examines tissues at the microscopic level, and pathology explores disease and abnormal function. In barbering, knowing physiology helps you understand how the scalp, hair follicles, and skin normally operate, so you can recognize when something is off and respond appropriately.