AT&T; LTE 3:11 PM K Ch32 33 Objectives for Animals.doc 22. If acoelomate animals
ID: 253743 • Letter: A
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AT&T; LTE 3:11 PM K Ch32 33 Objectives for Animals.doc 22. If acoelomate animals lack a coelom, what does this mean for them in terms of circulation of nutrients and oxygen to internal organs? What about movement...do they have a hydrostatic skeleton? 23. What is a trochophore larva and who has them? 24. Know how to classify flatworms according to the 4 animal 25. Be able to explain how marine flatworms capture food, Platyhelminthes body plan features (see #8). ingest the food, and digest the food. What features of their body plan that allow them to do this efficiently? 26. Do flatworms have a complete gut (one with a mouth at one end and an anus at the other end)? Do they have a circulatory system? A nervous system? Excretory system? 27. Do flatworms have a skeleton? How do they move? Are they segmented? 28. How do marine flatworms reproduce? 29, Know the different classes of flatworms and what characters they possess. What adaptations do the parasitic flatworms have for their parasitic lifestyle? 30. Know how to classify nematodes according to the 4 1. Generally, how do nematodes capture, ingest, and digest 32. Do nematodes have a skeleton? Can they move? How 33. What adaptations do the parasitic nematodes have for their animal body plan features (see #8). food? Do they have a complete gut? Are they segmented? parasitic lifestyle? Annelida 34. Know how to classify annelids according to the 4 animal body plan features (see#8). Next To DoExplanation / Answer
22. Acoelomates such as platyhelminths lack coelom and space between body wall and internal organs is filled with specila connective tissue called parenchyma or mesenchyma that secretes parenchyma fluid. This fluid helps in transportation of nutrients and oxygen to internal organs.
This fluid also serves as hydroskeleton and helps in movement and locomotion.
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