Simple Animals: Sponges, Jellies, & Octopuses - Crash Course Biology #22

2012-06-25

[public] 903K views, 13.3K likes, 211 dislikes audio only

Hank introduces us to the "simplest" of the animals, complexity-wise: beginning with sponges (whose very inclusion in the list as "animals" has been called into question because they are so simple) and finishing with the most complex molluscs, octopuses and squid. We differentiate them by the number of tissue layers they have, and by the complexity of those layers.

Table of Contents:

1) Porifera 1:33

2) Cnidaria 2:36

a) Diploblasts 2:48

3) Platyhelminthes 3:33

a) Triploblasts 3:56

b) Coelom 4:36

4) Biolography 5:36

5) Nematoda 7:26

6) Rotifera 7:57

7) Molusca 8:33

References:

http://www.ucmp.berkeley.edu/cnidaria/cnidaria.html http://www.slate.com/articles/health_and_science/science/2008/06/how_smart_is_the_octopus.html

http://en.wikipedia.org/wiki/File:Dicrocoelium_LifeCycle.gif

http://entnemdept.ufl.edu/creatures/nematode/soil_nematode.htm

http://soils.usda.gov/sqi/concepts/soil_biology/nematodes.html

http://www.eurekalert.org/pub_releases/2010-08/uoc--goa080410.php

http://www.ucmp.berkeley.edu/cambrian/cambrian.php

http://www.insidescience.org/news-service/1-2615

http://www.wormbook.org/chapters/www_genomevol/genomevol.pdf

http://www.cartage.org.lb/en/themes/sciences/zoology/animalclassification/Polygenetic/phylogenetictree/phylogenetictree.htm

http://www.esu.edu/~milewski/intro_biol_two/lab_9_porifera_cnidaria/Cnidaria.html

http://comenius.susqu.edu/biol/202/animals/protostomes/default.htm

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