Vocabulary
muscular system, cardiovascular system, circulatory system, nervous system, skeletal muscles, smooth muscles, cardiac muscles, reproductive system, excretory system, digestive system, metabolic waste, neurons, respiratory system, nervous system, stimuli, information, brain, nerve cells, neurons, reflex, external, internal, photons, electrical signals, homeostatic balances, light, temperature, danger, photosynthesis, chemical energy, phototropism, hydrotropism, neurons, central nervous system, brain, external stimuli, internal stimuli, sensory organ, reflexes, stimuli, organism, response, sense organs, reflex, neurons, central nervous system, endocrine system, pancreas, insulin, negative feedback response, positive feedback response, phototropism, photoreceptor, chemoreceptor, stimuli, organisms, amoeba, sight, touch, hearing, smelling, tasting, receptors, nervous system, neurons, brain, spinal cord, nerves, reflex, central nervous system, motor neurons