The most important structures to receive external stimulus are (1)__ and the system of these organs is called (2)____.
1. Receptors oragns 2. Sensory system 3. Ear 4. Eye 5. 5
The most important structures to receive external stimulus are receptor organs, and the system of these organs is called sensory system. Two prominent sense organs are the ear and the eye. Based on the sensations they receive, they into the types: gustatory, olfactory, visual, auditory and tactile systems.