1

Feb 28­5:47 PM

Animal Development

Feb 28­5:41 PM

Feb 28­5:42 PM Feb 28­5:42 PM

Feb 28­4:55 PM

Protostome

• First opening, blastopore, becomes its mouth.• Spiral Cleavage which is determinate

Examples• Arthropoda• Nematoda• Mollusca• Annelida• Platyhelmithes

Deuterostomes• First opening, blastopore, becomes its anus.• Radial Cleavage which is indeterminate

Examples• Chordata• Echinodermata

Feb 28­5:21 PM

2

Feb 28­5:25 PM Feb 28­5:27 PM

Spiral Cleavage

Feb 28­5:28 PM

Radial Cleavage

Apr 3­12:43 PM

Feb 28­5:56 PM Feb 28­6:03 PM

3

Feb 28­5:58 PM Feb 28­6:00 PM

Feb 28­6:01 PM Feb 28­5:27 PM

Body Cavity ­ Coelom

Feb 28­5:24 PM

Acoelmates

Feb 28­5:24 PM

Pseudocoelmates

4

Feb 28­5:23 PM

internal organs more complex and held in place by mesentarys

True coelmates

Feb 28­5:27 PM

Open vs. Closed Circulatory System

Feb 28­5:34 PM Feb 28­5:35 PM

Mar 14­1:40 PM

P. CtenophoraP. NematodaP. PoriferaP. ChordataP. PlatyhelminthesP. NemerteaP. CnidariaP. MolluscaP. ArthropodaP. BrachiopodaP. EchinodermataP. Rotifera