BZ 110 Chapter Notes - Chapter 13: Ascaris Lumbricoides, Necator Americanus, Seminal Vesicle
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Describe the unifying features that define the clade ecdysozoa. Describe one common function of the cuticle in ecdysozoan phyla covered in this chapter. Members of the phyla nematoda are united by common molecular features and an single morphological character. They all possess an nonliving, secreted cuticle that is molted periodically as they grow. Molting of the cuticle is called ecdysis. Ecdysozoan phyla are united by molecular characteristics and the presence of an nonliving cuticle that is molted during growth. The cuticle of arthropods is their exoskeleton, and in pseudocoelomate ecdysozoans, it aids in the function of the pseudocoelom as a skeleton. Explain how the body wall and pseudocoelom of an nematode influence locomotion of a nematode. Contrast the life cycles of common nematode parasites with the life cycles of digenetic flukes. Nematodes or roundworms are some of the most abundant animals on earth. Some 5 billion may be in every acre of fertile garden soil.
