HLTB21H3 Chapter 2: Health Studies, chapter 2 and 3

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14 Mar 2012
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Chapter 2 plagues, the price of being sedentary: Our oldest ancestors lived in africa 4. 2 million years ago and are named australopithecus anamnesis. 2. 5-1. 8 million years ago, they found a species homo habilis (handy man). This name is given because altered stones and animal remains where found with the fossils. H. habilis has zoonotic infections, which means that parasites were acquired from the wild animals that they killed and hunted. H. habilis might have suffered viral diseases such as mosquito transmitted yellow fever, hepatitis, herpes, colds. They probably did not have typhus, mumps, measles, influenza, tuberculosis, cholera, chicken pox, diphtheria or gonorrhea. 1. 6 million years ago, h. habilis was replaced by homo erectus (erect man), who was closer to modern humans in body size and had a brain bigger than . habilis, but with half the capacity of modern humans. Malthusian model suggests that uncontrolled population growth would lead to war, disease and starvation; this act as natural restrains , on population growth.

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