Station 25 Phylum: Nematoda – Level of Organization Organ-system level Tissue Layers Triploblastic Type of Digestive System Alimentary canal What type of digestion do they have? Extra- and intracellular Type of Excretory System Waste exits the excretory pores Type of Circulatory System None Type of Respiratory System None Type of Nervous System Cerebral ganglia or ring with anterior and posterior nerves Type of Body Cavity Pseudocoelomates Why is it considered a cavity”? It is not lined with mesoderm “false None Type of Asexual Reproduction Complicated life cycles Type of Sexual Reproduction Station 26 Phylum: Nematoda – Cross-section of a nematode (P 164, Fig 7.102-7.103) You will also be asked to examine the – through a human intestinal worm. You need to be able to identify the following structures: cuticle, epidermis, pseudocoel, longitudinal muscle, dorsal and ventral nerve cords, and the intestines. Station 27 Lophophorates – What is a lophophore? What are the three phyla that are commonly called lophophorates? What two other similarities are seen between these three phyla? What type of coelom do these organisms have?
Station 25 – Phylum: Nematoda Level of Organization Organ-system level Tissue Layers Triploblastic Type of Digestive System Alimentary canal What type of digestion do they have? Extra- and intracellular Type of Excretory System Waste exits the excretory pores Type of Circulatory System None Type of Respiratory System None Type of Nervous System Cerebral ganglia or ring with anterior and posterior nerves Type of Body Cavity Pseudocoelomates Why is it considered a “false cavity”? It is not lined with mesoderm Type of Asexual Reproduction None Type of Sexual Reproduction Complicated life cycles Station 26 – Phylum: Nematoda Cross-section of a nematode (P 164, Fig 7.102-7.103) – You will also be asked to examine the through a human intestinal worm. You need to be able to identify the following structures: cuticle, epidermis, pseudocoel, longitudinal muscle, dorsal and ventral nerve cords, and the intestines. Station 27 – Lophophorates What is a lophophore? What are the three phyla that are commonly called lophophorates? What two other similarities are seen between these three phyla? What type of coelom do these organisms have?
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