-know what the different germ layers give rise toorigin of embryonic tissue layersDiploblasts: Animals with embryos that have two types of tissueTriploblasts: Animals with embryos that have three types of tissueEctoderm: skin and the nervous systemEndoderm: lining of the digestive tract and organs that connect to the digestive tract such as the liverMesoderm: Circulatory system, muscle, Internal structures such as bone and most organs. Tissues in between covering of the animal and digestive tract.-study figure 30.2 and accompanying text-read up on cephalization-read up on the evolution of the coelomCoelomates:have an enclosed coelom which is totally line with mesodermal tissue.Acoelomates:have no enclosed coelomPseudocoelomates:have an enclosed coelom which is only partially lined with mesodermal tissue.-read up on the different modes of feeding in animals-study section “where do embryos develop?”Viviparous“Live Bearing”6
Oviparous “Egg Bearing”Ovoviviparous “Egg-Live Bearing”-study section on metamorphosis-what are choanoflagellates?-Read up on spongesWhat are triploblasts and diploblasts?-know the different types of symmetry and which animals exhibit which typesRadial SymetryCtenophoresmany CnidariansSome SpongesBilateral Symetry occurs in all triploblastic lineages7
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