HLTC23H3 Chapter Notes -Deciduous Teeth, Ontogeny, Heterochrony

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10 Aug 2012
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Evolutionary hypotheses for human childhood bogin, b (1997) Many historical sources from egyptian times to the 19th century, including wordsworth in the poem in the text, mention that childhood occupies the first 6-7 years of life. Evolutionary success is traditionally measured in terms of the number of offspring that survive and reproduce. Childhood (in this essay) is defined as the period following infancy, when the youngster is weaned from nursing but still depends on older people for feeding and protection. Several biological and behavioural characteristics of the youngster necessitate this dependency of childhood. In terms of feeding there are three major biological factors: Children continue the rapid brain growth experienced by infants and need a diet dense in energy and protein to support this brain growth. Children possess deciduous teeth, with thin enamel and shallow roots, and cannot process the adult-type diet.

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