animals kingdom. what are their similarities? what are their differences?
Post on 17-Dec-2015
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ObjectivesName the main characteristics
Explain what symmetry is
Describe what is cephalization
Mentioned the different body plans that animals have
Explain the difference of an open circulatory system vs. a closed one
Circulatory SystemNo circulatory system: ex. Sponges
Open circulatory system: ex. Arthropods, mollusks
Closed system: ex. mammals
The one thing that all invertebrates have in common is their lack of a backbone; otherwise, they're as different from one another as they are from vertebrates.
All vertebrates fall under one phylum, chordata;
invertebrates, on the other hand, include over 30 different phyla, collectively accounting for 98 to 99 percent of all known animal species.
Phylum Chordata
General Characteristics:
All chordates have a• dorsal hollow nerve tube, • a notochord, and • pharyngeal gill slits.
All vertebrates (members of a subphylum of chordata) have a backbone (spinal column) and a closed circulatory system.
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