BIOL 2P92 Lecture Notes - Lecture 19: Gastropoda, Trichuris, Opisthobranchia
27 Mar 2016
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In the phylum nematoda, copulatory spicules funcion to: hold the female vulva open against a hydrostaic pressure, from your observaions and dissecion of the nematode in lab 4, decide which of the following statements are true. Members of this phylum lack circular muscles therefore the cuicle is used to antagonize the longitudinal muscles. Nematodes lack a circulatory system: class oligochaeta - earthworm. Class hirudinida leech: characterisics typical of annelids are, segmentaion, a closed circulatory system and metanephridia, from your observaions of the leeches and clamworms in lab 4 select which of the following statements are true. Leeches have a ixed number of segments. c: leeches lack parapodia, from the dissecion of the earthworm in lab 4, select which of the following statements are true. The dorsal blood vessel acts as the pumping organ. The main funcion of the aoric arches is to maintain a steady pressure.
