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, habitat, hibernate, adaptations, behavioral adaptations, survival, reproduction, traits, organism, environment, adaptations, traits, offspring, natural selection, hibernate, migrate, extinction, behavioral adaptation, physiological adaptation, habitat, terrestrial, aquatic, structural adaptation, xylem,, external, structure, function, adapt, environment, predator, prey, external, structure, function, adapt, environment, predator, prey, organism, living, stimuli, reproduction, growth development, vertebrates, invertebrates, classified, characteristic, aquatic, scales, cold blooded, warm blooded, external, internal, mammal, reptile, amphibian, structure, function, organism, living, stimuli, reproduction, growth development, vertebrates, invertebrates, classified, characteristic, aquatic, scales, cold blooded, warm blooded, external, internal, mammal, reptile, amphibian, structure, function