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Invertebrates dfinch

Invertebrates for cghs biology

QuestionAnswer
What are the 3 major characteristics of the Animal Kingdom. Eukaryotic, Multicellular and Heterotrophic
What is asymmetrical no true body form or shape, No animals show asymmetry, usually found in Protist organisms.
Radial Symmetry Several planes can pass through the longitudinal axis giving the organism two equal halves.
Bilateral Symmetry Only one plane can pass through the longitudinal axis give two equal halves.
Acoelomates Organisms which lack a body cavity, as with the phylums Porifera, Cnidarians, and Platyhelminthes.
Pseudocoelomates Organisms which have a false body cavity
Coelomates Organisms which have a true body cavity, Phylums Annelida, Mollusca Arthropods and most of the rest of the invertebrates and vetebrates.
Incomplete Digestive System One in which there is only one opening. Nutrients and waste move through the same opening
Complete Digestive System Digestive system with two openings a mouth for nutrient materials and an anus for waste materials.
Phylum Porifera Only highly specialized cells, no tissues, mostly sessile ( non-moving) and have both forms of reproduction, sexual and asexual. Sponges belong to this phylum as the name means pore bearing.
Phylum Cnidaria Organisms in this group have stinging cells called cnidocytes. The jellyfish and freshwater hydras belong to this group. Tentacles contain the cnidocytes.
What body form do Cnidarians have? They have two body forms a medusa, like the jellyfish is a cup shape and a polyp, a vase shaped body with tentacles pointing upward.
What type of symmetry do cnidarians have? Radial Symmetry
Phylum Platyhelminthes Commonly called the flatworms include organisms like the tapeworm.
What type of body plan do the platyhelminthes have? They are aceolomates, which means they have no true body cavity.
Phylum Nematoda These are commonly called roundworms. Roundworms have a pseudocoelomate body plan.
The Trichina Worm A nematode that we can pick up from eating undercooked pork.
Ascaris Worm A nematode often affecting our pets, and is one of the worms we commonly treat with worm medication as a preventative.
Phylum Annelida Commonly called the segmented worms because their bodies have repeating units or rings that are each a different segment.
What type of digestive system does the phylum annelida have. Complete, two openings a mouth and an anus.
What type of body plan does the phylum annelida have. They are coelomates, with bilateral symmetry.
What is cutaneous respiration. It is respiration through the skin, like earthworms and frogs do.
Phylum Mollusca Contains the slugs, snails, bivalves and octopus and squids. They are coelomates, with bilateral symmetry and have 3 major classes of organisms in the phylum.
Class Bivalvia A class of mollusk that has two shells or valves, like the oyster, clam and scallop.
Class Gastropoda Includes the snails and slugs, with move on their stomachs over a slime layer.
Class Cephalopoda Includes the octopus and squids.
Phylum Echinodermata Means the spiny skinned animals, such as the sea stars, brittle stars and sand dollars.
How do echinoderms move. They use a water vascular system, with little tube feet called ampula that create a suction cup type system allowing them to grasp structures or objects to create movement.
Phylum Arthropoda Means jointed foot, which is the major characteristic for this group. This is the largest phylum of animals, including 80% of all animal organisms.
Subphylum Crustacean A group of Arthropods that include the crayfish, lobster and aquatic crabs.
Subphylum Chelicerata The chelicerates are specialized for having mouthparts modified to inject venom and eating. It includes spiders, scorpions and mites.
Subphylum Myrapoda The arthropod group containing centipedes and millipedes.
This myrapod has 1 pair of legs per segment and are fast carnivorous animals Centipedes
This myrapod has 2 pairs of legs per segment and are herbivores. Millipedes.
Supphylum Hexapoda Include all the insects which are identified by the class insectivora.
Created by: dfinch
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