Biology Notes

Biology Notes - Biology Notes The characteristics of the...

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Biology Notes The characteristics of the Flatworms are: - Bilateral symmetry The firsts group in which a body cavity appears are the Roundworms . The characteristics of the roundworms are: -pseudocoelom with a hydrostatic skeleton. Most of the remaining Phyla of the Animal Kingdom have a true coelom Protostomes vs. Deutrostomes Spiral/determinate cleavage vs. Radial/indeterminate cleavage The protostome branch of the Animal Kingdom branches into 3 separate phyla: They have spiral/determindatae cleavage. Mollusks Annelids Arthropods Mollusks are made up of: Gastropods (snails) Bivalves (oysters, clams, mussels, and scallops) Cephalopods (squids and octopuses) Characteristics of mollusks are: -they have ganglia concentrated in the head and have both a mantle and a foot. The Annelids have segmentation . The characteristcs of the Annelids are: - closed circulatory system with 5 hearts . They also have nephridia that filters blood and the fluid of the coelom to remove waste. They lack a developed respiratory system. The Arthropods are the first group to show the development of a respiratory system . They are made up of: Insects, Arachnids (spiders, mites, ticks, scorpions), Crustaceans (crawfish, shrimp, crabs, and lobsters) The characteristics of the Arthropods are: Exoskeleton (made of chitin) Compound eyes Gills, book lungs, or trachea They go through metamorphosis that can be either incomplete or complete. If it’s incomplete they just change in size and proportion. If its complete then there is a change
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Biology Notes - Biology Notes The characteristics of the...

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