Term
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Definition
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Term
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Definition
| Non-motile (having movement, but not locomotion |
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Term
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Definition
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Term
| Cellular Level of Organization |
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Definition
| Attributed to sponges because sponges have many types of specialized cells but no tissues |
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Term
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Definition
| Calcerous growths providing structural support and protection from predators |
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Term
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Definition
| "root" of sponge, where sponge attaches to stable surface |
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Term
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Definition
| Single opening in sponge, opposite of holdfast; water flows out of sponge through this structure |
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Term
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Definition
| The way water enters the body of the sponge |
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Term
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Definition
| Large internal cavity of sponges |
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Term
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Definition
| Collagen fibers that make up the skeletal structures of sponges |
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Term
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Definition
| Flagellated collar cells (thin transparent collar surrounds projecting beating flagellum |
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Term
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Definition
| Body type with choanocytes lining the spongocoel, lacks canals and chambers |
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Term
| Intermediate Type (syconoid) |
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Definition
| Body type similar to simple type, with folded walls. The internal chambers within the folded wall are lined with choanocytes. |
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Term
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Definition
| Body type containing an intricate arrangement of canals that lead to and from the choanocyte lined chambers |
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Term
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Definition
| "Nettle-animals"; have tentacles armed with stinging cells |
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Term
| Tissue Level of Organization |
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Definition
| Similar cells aggregate and form tissues |
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Term
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Definition
| Arrangement of body parts in a circle around a central axis |
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Term
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Definition
| Free-swimming, but with feeble locomotor abilities |
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Term
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Definition
| Often sessile, is usually elongate with tentacles at one end |
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Term
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Definition
| Free-swimming, bell- or saucer-shaped animal with tentacles around the margin or rim of the bell |
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Term
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Definition
| Solitary polyps or colonial with polyps and medusae in life cycle |
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Term
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Definition
| Solitary large medusae; polyps reduced or absent in life cycle |
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Term
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Definition
| Solitary or colonial polyps; no medusae in life cycle |
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Term
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Definition
| Elevated area at the oral end of a cnidaria containing the mouth |
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Term
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Definition
| Body cavity where digestion takes place |
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Term
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Definition
| Specialized cell containing a stinging structure |
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Term
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Definition
| Stinging structure located within cnidocytes |
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Term
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Definition
| Mitotic outgrowth for asexual reproduction |
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Term
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Definition
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Term
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Definition
| Cell layer that lines the gastrovascular cavity |
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Term
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Definition
| Noncellular layer between epidermis and gastrodermis |
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Term
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Definition
| Polyp equipped with tentacles and sac-like gastrovascular cavity |
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Term
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Definition
| Polyp consisting of a central stalk-like structure covered with medusa buds |
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Term
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Definition
| Buds produced asexually and escape through the opening at the tip of the reproductive polyp |
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Term
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Definition
| Tube-like extension from the bell, with the mouth on the end |
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Term
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Definition
| Female and male gametes are produced in separated individuals |
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Term
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Definition
| Free-swimming larva produced when embryos from medusae gamete fertilization develop |
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Term
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Definition
| Extensions around the mouth of a jellyfish (usually there are four) |
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Term
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Definition
| Site of attachment to substrate in a sea anemone |
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Term
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Definition
| Site of attachment to substrate in a sea anemone |
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Term
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Definition
| Orientation of sensory organs toward the "head" end of an organism |
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Term
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Definition
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Term
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Definition
| Tissue surrounding the digestive tract of acoelomate animals |
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Term
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Definition
| Animals with a simple body cavity, which is not lined with peritoneum |
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Term
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Definition
| Body cavity lining that separates eucoelomate organisms from pseudocoelomate organisms |
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Term
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Definition
| Organisms with a true body cavity lined with peritoneum |
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Term
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Definition
| One of the functions of the fluid-filled body cavity in invertebrate animals; of great adaptive significance to bilateral animals, providing something for muscles to push against |
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Term
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Definition
| Small anterior knob, used to attach to a constant surface |
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Term
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Definition
Many, tab-like units in members of the
phylum Platyhelminthes |
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Term
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Definition
| Area of sensory cells in the anterior section, photoreceptive |
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Term
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Definition
| Eyespots on the head; light sensitive |
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