Lecture_5_-_Porifera_Cnidaria_-_220911

Lecture_5_-_Porifera_Cnidaria_-_220911 - Lecture 5 (part 1)...

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Lecture 5 (part 1) - OUTLINE Phylum Porifera - Sponges 1. Introduction 2. Cell types Animal Diversity 5 th Ed. Chapter 6, Pages 112 - 122 Animal Diversity 4 th Ed. Chapter 6, Pages 110 - 121 3. Canal systems 4. Reproduction (assigned reading) BIOL 2030 Lecture 5 – Slide 1
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INTRODUCTION Porifera exhibit a cellular level of organization Share few characteristics with metazoans - Sometimes referred to as Parazoans [Gk. para , beside; z ō on , animals] essile aquatic filter feeders Sessile aquatic filter feeders BIOL 2030 Lecture 5 – Slide 2
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INTRODUCTION Phylum Porifera Calcarea Demospongiae Hexactinellida Class lcium liceous liceous Spicules Spongin absent absent may be present Habitat marine marine, deep sea marine & freshwater calcium carbonate six-rayed not six-rayed siliceous siliceous BIOL 2030 Lecture 5 – Slide 3
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CELL TYPES Choanocytes - ovoid flagellated cells Exposed end - line canal systems and chambers 1. Non-tissue nature 2. Cellular totipotency Embedded end 1. Generate water current 3. Capture incoming sperm 2. Capture small food particles BIOL 2030 Lecture 5 – Slide 4
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This note was uploaded on 04/06/2012 for the course BIOL biol 2030 taught by Professor Donni during the Winter '12 term at York University.

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Lecture_5_-_Porifera_Cnidaria_-_220911 - Lecture 5 (part 1)...

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