An illustration is shown through four steps. First two steps are marked as 'NERVOUS SYSTEM' and last two steps are marked as 'NERVOUS AND MUSCULOSKELETAL SYSTEMS.'

1. Step 1 shows a cat and a rat. Rat gathers information using sensory receptors like Sound, Odor and Visual Cues.
2. Step 2 shows brain cells of rat marked with the following text: Interneurons process information and determine necessary response.
3. Step 3 shows that brain cells of rat stimulate the muscles and following text is written: Nervous system stimulates muscles.
4. Step 4 shows two rats, one jumping and another sitting, and the following text is marked: Brain coordinates muscle action for escape response.