BIOL 2030 Chapter Notes - Chapter 3: Mucous Gland, Mollusca, Gastropoda
26 Feb 2017
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Flame cells: excretory organs (cid:120) identify: (cid:190) eyespots(light-receptors) (cid:190) lobe-like auricles (contains chemoreceptors and tactile cells) (cid:190) pharynx (cid:190) pharynx sheath (cid:190) mouth (cid:190) intestine. Consist of a pair of testes(anterior and posterior), two vas deferens, a seminal vesicle and a penis in a cirrus sac. Reproductive system of females (cid:131) consists of a branched ovary connected by oviduct to the ootype. During copulation sperm is ejected into genital pore. Eggs are produced in ovary and pass into the ootype (cid:120) identify: (cid:190) anterior sucker (cid:190) ventral sucker (cid:190) pharynx (cid:190) intestine (cid:190) intestinal caecae (cid:190) yolk duct (cid:190) terminal excretory pore (cid:190) excretory bladder. Lack digestive system and undergo only internal or cellular digestion. Male structure incles: testes, sperm ducts, cirrus and a common genital pore. Female structure includes: a vagina that leads from the genital pore to the seminal receptacle near the centre of the divided ovary and a yolk gland.
