Ch 33: Invertebrates - Anaelida Flashcards
What is the main characteristic of Anaelida?
Segmented bodies separated by septa
Phylum Polychaetes:What habitat do they live in?
Marine
Phylum Polychaetes: They contain fleshy paired projections called
Parapodia
Phylum Polychaetes: what worms have modified hook parapodia? what are they used for?
Tube worms, used for anchoring
Phylum Polychaetes: Do they have the same or separate sexes? Internal or external fertilization?
Separate, external
Phylum Oligeochaetes: What are two species studied in class?
Earthworms and leaches
Phylum Oligeochaetes: they have 100-175 segments with _____on the first and ____on the last.
mouth, anus
Phylum Oligeochaetes: what do they have that allow them to have better traction?
Cheatae on each segment
Phylum Oligeochaetes: what kind of gut do they have?
Complete
Phylum Oligeochaetes: what are two other body parts they have?
crop and gizzard
Phylum Oligeochaetes: why are they considered decomposes?
they digest soil and loosens, aerates it and contributes to its nutrition
Phylum Oligeochaetes: what is the excretory tube called and how is it shaped?
Metanephridium – funnel shaped
it also has cilia
Phylum Oligeochaetes: open or closed circulatory system?
closed
Phylum Oligeochaetes: what is their nervous system like?
they have a pair of cerebral ganglia
Phylum Oligeochaetes: do they have eyes?
no, but they are light sensitive and have touch sensitive cells
