Acoelomates: Phylum Platyhelminthes and Nemertea - Biosciweb.net
Acoelomates: Phylum Platyhelminthes and Nemertea - Biosciweb.net
Acoelomates: Phylum Platyhelminthes and Nemertea - Biosciweb.net
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<strong>Acoelomates</strong>: <strong>Phylum</strong> <strong>Platyhelminthes</strong> <strong>and</strong> <strong>Nemertea</strong> <strong>and</strong><br />
Pseudocoelomates: Phyla Nematoda <strong>and</strong> Rotifera & Parasitism 6.8<br />
Lab #6 - Biological Sciences 102 – Animal Biology<br />
‣ NEMATODES (<strong>Phylum</strong> Nematoda)<br />
Ascaris lubricoides = intestinal roundworm<br />
Ascaris lumbricoides -- Intestinal roundworm<br />
Adults (male & female)<br />
in human intestine<br />
shelled embryos<br />
in feces<br />
shelled larvae<br />
develop (10-15<br />
days) on soil.<br />
in lung, larvae leave<br />
blood, move to<br />
trachea, esophagus<br />
larvae emerge in<br />
duodenum, pe<strong>net</strong>rate gut<br />
wall <strong>and</strong> enter blood stream<br />
shelled larvae<br />
ingested by humans<br />
with food or water<br />
Ancylostoma duodenale = hookworm<br />
Ancylostoma duodenale -- Hookworm<br />
Adults in human<br />
intestine<br />
thin shelled embryos in feces<br />
larvae develop,<br />
hatch in soil<br />
esophagus<br />
larvae grow,<br />
feed on feces<br />
bronchi<br />
in lung, larvae leave<br />
blood, enter alveoli<br />
larvae attach,<br />
pe<strong>net</strong>rate skin,<br />
enter blood stream<br />
Enterobius vermicularis = pinworm<br />
Enterobius vermicularis -- Pinworm<br />
Adults (male & female)<br />
in human large intestine<br />
<strong>and</strong> cecum<br />
females migrate to<br />
anus at night<br />
deposited shelled<br />
embryos cause itching<br />
hatch in duodemum<br />
reinfection of self,<br />
others, water <strong>and</strong> food.<br />
Also in air or dust.<br />
fingernails <strong>and</strong><br />
clothing pick up<br />
shelled embryos
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