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Invertebrates

QuestionAnswer
Invertebrates belong to what Kingdom? Animalia
What do we call animals that do not have a backbone? Invertebrates
Amoeba, with no particular shape, have what kind of symmetry? Asymmetry
Sea stars, hydra, & jelly fish have what type of symmetry? Radial symmetry
What type of symmetry provides a mirror image when a line is drawn from head to toe through an organism? Bilateral symmetry
What term refers to the head end of an organism? Anterior
What term refers to the 'tail' end of an organism? Posterior
What term refers to the back side of an organism? Dorsal
What term refers to the belly side of an organism? Ventral
What term refers to organisms like the sponge that are not able to move themselves from one location to another? Sessile
What term refers to the tissue arrangement with only ectoderm, mesoderm & endoderm? Acoelomate
What organisms are acoelomate? Sponges, hydra, jellyfish
How do sponges get their food? Filter feeding
What cell in a sponge line the osculum and beat their flagella to draw water through the sponge? Collar cells (Choanocytes)
What structure is the exit for water, waste & sperm from a sponge? Osculum
What cells line the outside of the cell & can control the opening & closing of pore cells? Pinacocyte (epithelial) cells
Which cells in a sponge allow water to pass through? Pore cells
What cells of a sponge move food from the pore cells, move waste to the pore cells, & distribute sperm through the interior. Amoebocytes
What term refers to organisms like the sponge that can produce both sperm & eggs. Hermaphrodite
Sponges belong to what phylum? Phylum Silicea, Calcarea (Porifera)
Hydra, coral, & jellyfish belong to what phylum? Phylum Cnidaria
Do Cnidarians have a coelom? No, they are acoelomate
A hydra has what body form? Polyp
A jellyfish has what body form? Medusa
What type of nervous system do Cnidarians have? Nerve impulses
What stinging structure do Cnidarians (hydra & jellyfish) fire to capture their prey? Nematocyst
What type of digestive system do Cnidarians have? Gastrovascular cavity
Flatworms belong to what phylum? Phylum Platyhelminthes
The Phylum Platyhelminthes include what 3 kinds of organisms? Planaria, tapeworms & flukes
Do flatworms have a coelom? No, they are acoelomate
What term refers to the ability of flatworms to regrow body parts? Regeneration
What kind of nervous system do flatworms have? Nerve net
The digestive tract of a flatworm has how many openings? One opening
Roundworms & hookworms belong to what Phylum? Phylum Nematoda
What kind of digestive tract do roundworms have? Complete digestive tract with 2 openings
Do nematodes have a coelom? No, they have a pseudocoelom
What organisms belong to the phylum Nematoda? Roundworms & hookworms
What is a pseudocoelom? A pseudocoelom has a body cavity with mesoderm on one side & endoderm on the other (ectoderm, mesoderm, body cavity, endoderm)
Segmented worms belong to what phylum? Phylum Annelida
What kind of digestive tract do segmented worms have? Complete digestive tract with 2 openings
The Phylum Annelida includes what segmented worms? Earthworms & leeches
Do segmented worms have a coelom? Yes
What is a coelom? A fluid-filled body cavity completely surrounded by mesoderm
What is the advantage to having a coelom? The fluid-filled body cavity surrounded by mesoderm cushions & protects internal organs.
Insects belong to what phylum? Phylum Arthropoda
What organisms belong to the phylum Arthropoda? Insects, crayfish, spiders, daphnia, centipedes, millipedes, horseshoe crabs, scorpions
What do all Arthropods have? Jointed appendages & an exoskeleton
Do Arthropods have a coelom? Yes
What is an exoskeleton? A hard outer protective skeleton
What type of nervous system do Arthropods have? Double ventral nerve cord
What kind of digestive tract do Arthropods have? Complete digestive tract with 2 openings
Created by: 100001916589047
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