Humans are the dominant and intelligent species of the planet Earth.
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Humans, also known by the scientific term Homo sapiens, are terrestrial animals, characterized by their erect posture and bipedal locomotion; high manual dexterity; open-ended and complex language use compared to other animal communications; larger, more complex brains than other primates; and highly advanced and organized societies. Human biology is also considered to be fairly average for normal standards. The most commonly defined body systems in humans are the nervous, cardiovascular, circulatory, digestive, endocrine, immune, integumentary, lymphatic, musculoskeletal, reproductive, respiratory, and urinary system.