Which of the following is a sensory system structure?

• A. Brain
• B. Eyes, Ears, Mouth, Nose, Throat, Skin
• C. Heart
• D. Lungs

Answer: (B)

The key idea is identifying the parts of the body that detect stimuli and send sensory information to the brain. Sensory system structures are the organs that perceive the world—eyes for sight, ears for hearing (and balance), the nose for smell, the tongue and mouth for taste, and the skin for touch. The throat is included because it plays a role in sensing certain sensations as part of the mouth and airway region, and overall these structures together form the body’s sense organs that detect changes in the environment.

The brain, while essential for processing these signals, is a processing center rather than a sensory structure itself. The heart and lungs aren’t sensory organs; they are primarily responsible for circulation and respiration, respectively. So the option listing eyes, ears, mouth, nose, throat, and skin best represents the sensory system structures.