Unit 11 Phylum Mollusca – Guided Notes General Characteristics

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Bu səhifədəki naviqasiya:

• Four classes
• _____________
• ____________________________________ The visceral mass twists _________________
• ________________________________________________________ _________________________________________________________________
• Class Bivalvia (2 shells connected by a hinge)
• Class Cephalopoda (Head-foot)

Unit 11 - Phylum Mollusca – Guided Notes General Characteristics Three body parts: ________________________àmuscular foot: _______________________________ May be modified in squid and octopus _______________________________ Contains the internal organs(heart, organs of digestion, reproduction and excretion) __________________ Thin body covering (contains calcium carbonate) Secretes shell Reduce surface area for gas exchange à evolved gills Respiration ___________________________________________________________ Nitrogenous wastes are excreted through _____________ __________________________with dorsal heart and vessels, hemocoel for return of circulatory fluid _______________________________with mouth, radula = flexible tongue like strip of tissue covered with tough abrasive teeth that point backward _________ is used to graze, drill, or function as a poisonous dart/beak i.e.octopus Four classes Amphineura (polyplacophora) Bivalvia Gastropoda Cephalopoda Class Amphineura (Polyplacophora) – the chitons Marine organisms Shell is made up of _________________________ Have a ___________________________(crawling) Reduced head About 650 species of these organisms Cling to rocks in the intertidal zone and use a tooth- like _____________to scrape food off of rocks (herbivores) __________________________________ Class Gastropoda (Stomach-foot) ___________________________ ___________________________ Characterized by _____________________ ___________________________________ Breathe through ______ (ctenidia) or _______ _________________________ (gas diffusion) _____________________extends along the ventral surface of the organism Gastropods undergo a process called ____________________________________ The visceral mass twists _________________ in relation to the head Results in the mantle cavity, gills and anus _____________________________ ________________________________________________________________ Because of ________________________________________________________ _________________________________________________________________ Head contains a pair of _________________________ Scraping _______________to pick up food Slug does ________ have a shell Usually becomes active during the cool moist part of the day Only molluscan class to become terrestrial Open circulatory system Circulatory fluid = hemolymph Nudibranchs (___________________) Marine gastropods that ____________________ Nudibranch means “__________________” refers to the fact that gas exchange happens across the entire surface of these animals Class Bivalvia (2 shells connected by a hinge) _______________________________________________________________ Mainly marine – living in intertidal zone _______________________________________________________________ The mantle______________________________________________________ ________________________________________________ ___________________: Take water containing food into the mantle cavity and pass it over the mouth Excess water is forced out through the excurrent siphon Oldest part of the shell is the area surrounding the hinge (called the ___________) Exclusively marine __________________________ Burrow in sand or rock or attach to substrate by secreting byssal threads _____________________________________________ _______________________– external fertilization Class Cephalopoda (Head-foot) __________________________________________________ All members of this class are ________________ _______________________________________________________ All __________________ Have tentacles and a central mouth containing a ___________________ Many of these organisms contain a large _____________that is used when trying to escape from potential predators They have well _________________________________ They contain special pigment cells called ____________________which enable them to change color They have ___________________________ Their circulatory system is a _________________________ _________________________: Can force water out siphon Catch prey with arms injecting poison with _________________ Internal fertilization – ________________ Kataloq: LOR LOR -> Сравнительная оценка применения антибактериальных препаратов у детей с острым верхнечелюстным синуситом л. И. Усеня, Е. П. Карпова LOR -> I who eleven times did multiply LOR -> Холодноплазменная тонзиллэктом LOR -> Armenian-russian export-import bank gazprombank group LOR -> List of plant species occurring at Lorance Creek – Big Lake Conservation Area Updated 4 March 2012 471 species LOR -> The Story of the Aten Aten's LOR -> Masarykova univerzita LOR -> Curriculum Vitae: Lorenzo Prendini, Ph. D Yüklə 11.56 Kb. Dostları ilə paylaş: