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1. a chart to compare the advancements of each phylum over the previous phylum.a) Porifera vs Cnidaria
b) Cnidaria vs Platyhelminthes
c) Platyhelminthes vs Nematoda
2. the comparison of the characteristics of a successful parasitic worm to those of a successful free-living worm.Turbellaria vs Cestoda
3. necator (hOOKWORM) Hookworms are parasitic worms which cause worldwide disease, affecting up to 700 million people. For the most time, Hookworms live in the small intestine of humans where they lay thousands of eggs that are excreted out of the body along with human feces. While outside, the eggs then hatch and mature to release larvae, using the feces as fertilizer. The fabulous fact about hookworms is that, to enter human body, they would release toxin between human's toes to make human scratch. Benefited by the small cuts on the skin resulted from humans' scratching, the hookworms are able to enter into humans' bodies. Then, the larvae arrive in the small intestine by blood stream. To acquire more oxygen, the larvae may even enter the lungs. When human coughs, the hookworms are coughed up from the lungs and therefore go back to the intestines where they lay eggs.
The hookworms do not cause symptoms for most people, while some people may have blood loss, anemia, and protein loss because of the hookworms infection. However, the hookworms infection is easily treated with medicine. 4. Ascaris Dissection |