2030lecture7 - OUTLINE Phylum Cnidaria - Jellyfish etc. 1....

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
1 OUTLINE Phylum Cnidaria Animal Diversity 5 th Ed. Chapter 7, Pages 123 - 146 4 th Ed. Chapter 7, Pages 122-144 1. Introduction 2. Body Forms and Structure 3. Cnidocytes 4. Nerve Net 6. Sensory Structures - Jellyfish etc. c c c c c Lecture 7 - 1 DIGESTION - gastrodermal gland cells secrete enzymes into gastrovascular cavity - digestion starts in the gastrovascular cavity – i.e. extracellular digestion - nutritive-muscular cells phagocytize food particles - i.e. intracellular digestion gastrovascular cavity gastrodermis Lecture 7 - 2
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 SENSORY STRUCTURES Medusae are mobile, therefore require sensory structures Ocelli - simple light receptors (phototaxis) Statocysts - for control of balance (gravity) Sensory lappets - touch and/or chemical receptors All of the above are contained within a structure called a rhopalium , forming a “sense organ” “Sense organs” distributed around the fringes of the medusae umbrella Lecture 7 - 3 ASSIGNED READING Phylum Ctenophora Pages 142 - 143 Animal Diversity 5 th Ed. Pages 140 - 142 Animal Diversity 4 th Ed. Keywords - nematocysts - colloblasts - comb plates Lecture 7 - 4
Background image of page 2
3 OUTLINE Phylum Platyhelminthes flatworms, flukes and tapeworms Animal Diversity 5
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 06/17/2010 for the course BIOLOGY bio 2030 taught by Professor .. during the Fall '10 term at York University.

Page1 / 9

2030lecture7 - OUTLINE Phylum Cnidaria - Jellyfish etc. 1....

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online