Vocabulary
neurons, central nervous system, brain, external stimuli, internal stimuli, sensory organ, reflexes, nervous system, stimuli, information, brain, nerve cells, neurons, reflex, external, internal, photons, electrical signals, homeostatic balances, light, temperature, danger, photosynthesis, chemical energy, phototropism, hydrotropism, cells, tissues, organs, systems, nervous tissue, connective tissue, muscle tissue, epithelial tissue, stimuli, cells, tissues, organ, organ system, nervious tissue, epithelial tissue, connective tissue, muscle tissue, nervous system, respiratory system, digestive system, circulatory system, excretory system, urinary system, 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, organ, tissue, cell, multicellular organism, organism, internal functions, organ system, muscle tissue, muscular system, contract, relax, voluntary movement, involuntary movement, cardiac tissue, oxygenated blood, deoxygenated blood, circulatory system, respiratory system, connective tissue, bone tissue, osteocyte, osteoblast, osteoclast, mineral absorption, calcium, blood vessel, nerves, nervous system, metabolism, brain tissue, neuron, microglia, astrocyte, stimuli