**Core Concept**
Ergonomics is the scientific discipline concerned with the understanding of interactions among humans and other elements of a system, and the profession that applies theory, principles, data, and methods to design in order to optimize human well-being and overall system performance. It involves the design of tasks, jobs, products, environments, and systems to match the capabilities of humans.

**Why the Correct Answer is Right**
Ergonomics is essential in healthcare settings, particularly in operating rooms, emergency departments, and patient care areas. It involves the application of principles such as the use of adjustable furniture, proper lighting, and reduction of physical strain to prevent musculoskeletal disorders. Ergonomic principles can also be applied to the design of medical equipment, such as wheelchairs and hospital beds, to improve patient safety and comfort.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because ergonomics is not limited to physical or mechanical aspects; it also encompasses cognitive and organizational factors.
**Option B:** This option is incorrect because while ergonomics does involve the design of products, it is a broader field that encompasses the design of tasks, jobs, environments, and systems.
**Option C:** This option is incorrect because ergonomics is not a type of medical equipment; rather, it is a discipline that informs the design of medical equipment.

**Clinical Pearl / High-Yield Fact**
Ergonomics is often overlooked in healthcare settings, but it can have a significant impact on patient safety and healthcare worker well-being. A key principle of ergonomics is to "fit the task to the person," rather than forcing the person to adapt to the task.

**Correct Answer:** C.