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Biology 1104k Notes: Animals

by: Logan Barnes

Biology 1104k Notes: Animals Bio 1104k

Marketplace > Georgia State University > Biology > Bio 1104k > Biology 1104k Notes Animals
Logan Barnes
GPA 4.19

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Notes over Animals. This will be on test/study guide
Introductory Biology II
Dr. Chapman
Class Notes
Bio, Biology1104k, animals
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This 2 page Class Notes was uploaded by Logan Barnes on Saturday February 13, 2016. The Class Notes belongs to Bio 1104k at Georgia State University taught by Dr. Chapman in Spring 2016. Since its upload, it has received 25 views. For similar materials see Introductory Biology II in Biology at Georgia State University.


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Date Created: 02/13/16
Animals—Ch. Whatever Classification of Animals Animals were traditionally classified on basis of physical appearance &dvlpmental featires o On things like: Grade of body organization Type of body symmetry o Germ Layers o Presence or absence of true body cavity o Patterns of embryonic development Modern molecular techniques have largely confirmed traditional animal classification Levels of organization in animal complexity: o Cellular grade o Tissue grade o Organ grade o Organ system grade Animals are o Multicellular o Heterotrophic o Some stage in life has sexual reproduction o Moving at some point During early development of most animals, distinct layers of cells form (germ layers) o Differentiate into specific organs/organ systems in development process Diploblastic animals—Ectoderm and endodermic layers o Endoderm—has mesoglea (jellylike) in it, hence the squishiness o Cnidarians (jellyfish, coral, etc) o Ctenophores (comb jellies) Triploblastic animals--the ectoderm, mesoderm, and endoderm o Divided into protosome and deuterostome o Protosome—Mouth forms first  Ex: roundworm o Deuterostome—anus forms first  Ex: human o 3 types of triploblastic animals based on presence or absence of body cavity outside the gut: Coelem: refers to the main body cavity in most multicellular animals and is positioned  inside the body to surround and contain the digestive tract and other organs o  Coelomate—has coelem Etc: humans  Pseudocoelomate—Had body cavity, fluid-filled, only partially lined w/ mesoderm Ex: nematode, roundworm  Acoelomate—no coelem Ex: flatworm  Animals must expend energy to get food o 2 basic life strategies in terms of mobility/food energy expenditure o Sescile—feed passively as filter feeders o Motile—more active feeding  Group Grade of Body Body Nervous Digestiv Reproduction Other Distinguishing Organizati Symm. Cavity System e Features on System Porifera Cellular Asymm N/A no None None Asexual Water canals with etrical tissue (occurs (budding) choanocytes; s at a Sexual (released Spicules, etc. cellular through level) Osculum) Annelid Organ Bilater Coelo Anterior Complet Sexual (most Segmented bodies; s System al m brain, e hermaphroditic) Some groups have setae, nerve Can be asexual etc. cords, (fragmentation) segmen tal ganglia


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