ISB 202 - ISB 202 Crustaceans same comes from the hard crusty(but flexible shell found on most o But also creepy things like millipede Note the

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
ISB 202 11-20-08 Crustaceans- same comes from the hard “crusty” (but flexible) shell found on most o But also creepy things like millipede. Note the segmented bodies of all of these Categorizing o Sponges-no tissues or organs o Cnidarians- first to have tissues o Flatworms-first to have organs o Roundworms- complete digestive system o Mollusks- first with a coelem o Echinoderms-a strange phylum Higher forms than arthropods in some ways But they have no central brain They have sensors in various body parts Sensors act like individual brains, react to something, and get the other parts to cooperate There’s one some of you have eaten at an Asian restaurant. Sea Cucumber. Here’s another- starfish Chordates (the most advanced group) o Broken down into three subphyla o Vertebrates Most chordates are vertebrates and have: 1. Backbones 2. Nerve cord on the dorsal (top) side 3. Pharynx for breathing or feeding (or both) 4. Embryos all have tails (and most adults do) Fish types:
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/21/2011 for the course ISB 202 taught by Professor Johnson during the Fall '08 term at University of Michigan.

Page1 / 4

ISB 202 - ISB 202 Crustaceans same comes from the hard crusty(but flexible shell found on most o But also creepy things like millipede Note the

This preview shows document pages 1 - 2. Sign up to view the full document.

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