Chapter 3: Simple Animals
- Northern Illinois University
- Biology 207
- Chapter 3: Simple Animals
Last Modified: 2012-02-05
- Water enters though porocytes and exits though osculum
- Water moves though spongcoel because of beating flagella of chanocytes
- Choanocytes extract food particles from water
- Primarily polyps, often colonial polyps
- May metamorphose into medusae
- Primarily medusae
- Larvae form polyps which give rise to more medusae
- Exclusively polyps
- May form large colonies (reefs)
- Free living, Fresh water or marine
- Predators or scavengers
- Parasites, Usually 2-3 hosts
- Complex life cycles: miracidium, cercaria, adult
- Parasites, usually in vertebrates
- bodies are colonies of proglottids anchored to host by a scolex
- Bilaterally symmetrical, cephalized, one-way digestive tract, pseudocoelom, cuticle
- Free living or parasitic
Words From Our Students
"StudyBlue is great for studying. I love the study guides, flashcards, and quizzes. So extremely helpful for all of my classes!"
Alice, Arizona State University
"I'm a student using StudyBlue, and I can 100% say that it helps me so much. Study materials for almost every subject in school are available in StudyBlue. It is so helpful for my education!"
Tim, University of Florida
"StudyBlue provides way more features than other studying apps, and thus allows me to learn very quickly! I actually feel much more comfortable taking my exams after I study with this app. It's amazing!"
Jennifer, Rutgers University
"I love flashcards but carrying around physical flashcards is cumbersome and simply outdated. StudyBlue is exactly what I was looking for!"