Term
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Definition
| mesenterial filaments formed into long threads that hang free in the gastrovascular cavity and may be extruded through the mouth; function in defense and feeding |
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Term
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Definition
| a specific, crystalline form of calcium carbonate comprising the skeletons of corals. |
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Definition
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Definition
| skeletal cup-like depression in which the coral polyp resides |
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Term
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Definition
| an eversible organelle found in certain cells of the cnidarians. The most important and widely-distributed type is the nematocyst; spirocysts (adhesive thread-bearing) and ptychocysts (mucus –producing) are found only in anthozoans. |
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Term
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Definition
| a cnidarian cell that contains a cnida |
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Term
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Definition
| gastrovascular cavity: the gastrovascular cavity of cnidarians |
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Definition
| the entire matrix of shared mesenchyme that is perforated with gastrovascular channels that are continuous among members of a cnidarian colony; it is covered with an epidermis. |
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Definition
| thin sheet of tissue that interconnects the polyps of corals (and other colonial cnidarians). It is composed of an outer epidermis and an inner coenenchyme that lies against the skeletal face. |
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Term
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Definition
| a supportive skeletal process that rises from the center of the basal plate of a corallite. |
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Definition
| the skeleton of a single polyp |
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Definition
| the entire skeleton of a scleractinian coral. |
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Definition
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Term
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Definition
the sheltered or protected side; opposite the windward or seaward
side |
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Term
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Definition
generally free-swimming form of a cnidarian that has a well
developed, thick and gelatinous mesenchyme and a bell-shaped body bearing
downward directed tentacles and mouth. |
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Term
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Definition
primitive “connective tissue” derived at least in part from
ectoderm and located between the epidermis and gastrodermis (i.e.,
endodermis); generally consists of a noncellular, jellylike matrix (i.e., mesoglea)
and various cells and cell products (e.g., fibers). |
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Term
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Definition
projections of the inner body wall and thus are lined with
gastrodermis and filled with mesenchyme; project radially inward toward the
oral-aboral axis; may be fused with the pharynx (complete mesenteries) or not
(incomplete mesenteries) |
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Term
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Definition
specialized epithelial cells with basal extensions capable of
contraction (epithiolomuscular and nutritive-muscular cells of the epidermis and
gastrodermis, respectively). |
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Term
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Definition
| stinging cnidae of cnidarians that contain a paralytic protein toxin. |
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Term
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Definition
generally sessile form of a cnidarian with a thin mesenchymal layer
and a tubular body with tentacles and mouth directed upward. |
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Term
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Definition
directed or situated toward the sea; side of reef facing the incoming
waves |
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Term
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Definition
radially arranged calcareous partitions that arise from the
basal plate and thecal walls of the corallite. (syn., sclerosepta). |
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Term
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Definition
one or more ciliated grooves of the pharynx which function to
drive water into the coelenteron |
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Term
| Stomodeal pharynx (syn., Actinopharynx) |
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Definition
essentially an inward, tubular
extension of the mouth and therefore is comprised of the same three layers as
the body wall. |
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Term
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Definition
| outer wall of a corallite |
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Term
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Definition
| side facing or receiving the force of the incoming winds |
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