Radiata Acoelomates

Radiata Acoelomates - Radiata Acoelomates Radiata Distinct...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

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

Unformatted text preview: Radiata Acoelomates Radiata Distinct tissues derived from two layers (ectoderm and endoderm) epidermis and nervous system develop from ectoderm gastrodermis develops from endodermis Between the two layers is a gelatinous material ( mesoglea ) that contains the muscles True body symmetry Radiata Cnidaria Ctenophora Bilateria all others Radiata Cnidarians nearly all marine Carnivorous (capture they prey with tentacles). cnidocytes nematocysts T wo basic body plans Polyps cylindrical attached to substrate Can live single or in colonies The mouthfaces upwards May develop and external or internal skeleton made of calcium carbonate Reproduce asexually bubuding Medusae- Free floating (jelly fishes) Umbrella shaped Mouth faces upward and tentacles face downward Reproduce sexually fertilized eggs give rise to planulae internal extracellular digestion Two Body Forms Digestive and Circulatory System Gastrovalcular Cavity Serve as both digestive and circulatory system Lacks of specialized cells One opening that serves as mouth and anus All cells are exposed to all stages of food digestion Oxygen is transported into the cavity by an internal fluid Mouth Food Wastes Digestive enzymes are released to digest food particles....
View Full Document

Page1 / 27

Radiata Acoelomates - Radiata Acoelomates Radiata Distinct...

This preview shows document pages 1 - 8. Sign up to view the full document.

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