Animal DiversityII

Animal DiversityII - Animal Diversity-Chordata Tunicates...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Animal Diversity-Chordata 11/03/2008 14:00:00 Tunicates Lancelates Notochord o Precursor to backbone o Present for at least part f life Vertebrates Vertebal column replaces notochord o Dorsal nervous system o Coelomates Internal skeleton Organs in coelom Well developed circulatory system Earliest were probably mud suckers o Similar to jawless fishes Lamprey o Osmoregulatory abilities Controlling levels of solutes Examples o Jawless Fish Lamprey Parasitic Blood meal Teeth at one end o Cartilaginous fish Sharks
Background image of page 1

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

View Full DocumentRight Arrow Icon
First real Jaws Skeleton made from cartilage o Ray-finned/ boney fish Cartilage replaced by bony skeleton Includes most fish Lunglike sacs for respiration Modified into swim bladder Used for buoyancy Further modification allows for gas-exchange Tetrapods o Amphibians First vertebrates on land Confined to moist habitats
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/03/2008 for the course ECOL 182 taught by Professor Chesson during the Spring '08 term at Arizona.

Page1 / 4

Animal DiversityII - Animal Diversity-Chordata Tunicates...

This preview shows document pages 1 - 3. Sign up to view the full document.

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