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Human Origins

eamon avatar
eamon
9 diapositives · 392 Views · Jul 21, 2014

Human Origins. Human as primates. The primates are an order of mammals, including apes, monkeys, tarsiers and lemurs. They were named primates because they were considered the highest order of animals. We are also categorized under primates, due to our anatomical similarities.

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Human Origins
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  1. Human Origins

  2. Human as primates • The primates are an order of mammals, including apes, monkeys, tarsiers and lemurs. • They were named primates because they were considered the highest order of animals. • We are also categorized under primates, due to our anatomical similarities.

  3. Characteristics similar to humans. • Grasping limbs, with long fingers and a separated opposable thumb. • Mobile arms, with shoulder joints allowing movement in three planes and the bones of the shoulder girdle allowing weight to be transferred via the arms. • Stereoscopic vision, with forward facing eyes on a flattened face, giving overlapping fields of view. • Skull modified for upright posture.

  4. Human origins Ardipthecusramidus (4.4 million years) They suggest characters intermediate between chimpanzees and Australopithecus: • Small numbers of large molars, like chimps • Incisors slightly smaller than those of chimps • Canines blunt and projecting less than nose of chimps • Foramen magnum (hole through which spinal cord enters the skull) further forward than in apes, suggesting Ardipithecus was at least partially bipedal.

  5. Human origwins

  6. Trends in hominid fossils • Hominids are members of the family Hominidae – the family that includes humans. • A notable feature of this family I walking on two - legs bipedalism. • Homo sapiens is currently the only species of hominid but other species existed in the past.

  7. Trends in hominid fossils • AT various stages in hominid evolution, several species almost certainly co-existed, for example Homo sapiens with Homo neanderthalensis. • Many hominid fossils have been found, dated and assigned to a species.

  8. Hominid fossils • These fossils shows the following evolutionary threads: • Including increasing adaptation to bipedalism. • Increasing brain size in relation to body size.

  9. Brain sizes