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Definition
| specialized cells that contain the nematocyst |
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Definition
| organelle(s) discharged from cnidocytes |
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Definition
| a specialized stinging organelle unique to cnidaria |
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Definition
| Water in the gastrovascular cavity at a high pressure that supports the organism's shape |
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Definition
| One of two body forms for Cnidaria (attached/hydroid) |
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Definition
| an individual in a colony |
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Definition
| One of two body forms for Cnidaria (free-swiming) |
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Term
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Definition
Outer layer of "skin"
Epithelial cells contract to act as muscles |
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Term
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Definition
| lines the gastrovascular cavity |
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Term
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Definition
| Extracellular matrix found between epidermis and gastrodermis. Much larger in medusae. |
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Term
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Definition
Innermost body cavity
Incomplete gut
Extracellular digestion in cavity and intracellular digestion in gastrodermal cells |
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Definition
| Epithelial cells that contract because Cnidaria don't have muscle tissue. |
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Term
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Definition
| BALANCE; sense organs for balance |
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Term
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Definition
| PHOTOSENSITIVITY; sense organs to detect light |
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Term
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Definition
| In a cladogram: when 1 branch branches into 3 or more separate branches. |
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Term
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Definition
| contains symmetrical and asymmetrical synapses |
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Term
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Definition
| When a single genotype can express more than one body form |
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Term
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Definition
| Feeding zooid of a polyp colony |
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Term
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Definition
| Reproductive zooid of a polyp colony (no tentacles) |
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Term
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Definition
| Fold of tissue from bottom of bell that extends into the bell. Hydromedusae have it, schyphomedusae don't. |
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Term
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Definition
| Asexual reproduction in polyps |
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Term
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Definition
| Asexual reproduction in anemones. A piece of the pedal disc break off and regenerate the organism. |
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Term
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Definition
Zygote develops into a ciliated planula which settles into a polyp.
Swims in one distinct direction giving it BILATERAL SYMMETRY. PROBLEMS |
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Term
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Definition
| Feeding polyp (same as hydranths) |
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Term
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Definition
| Reproductive polyp (same as gonangia) |
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Term
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Definition
| Fishing tentacles that sting prey (also for defense) |
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Term
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Definition
| Colonial pedal disk. Connects colony to base. |
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Term
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Definition
| Covering of the capsule of Cnidocytes.Opens and rapidly releases the increased hydrostatic pressure launching the thread. |
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Term
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Definition
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Term
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Definition
| Causes water to rush into the capsule. |
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Term
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Definition
| Rapid increasing forces the nematocyst out of the capsule. |
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Term
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Definition
| Extended mouth edge that is used in capturing and ingesting prey. |
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Definition
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Definition
| The living part of the hydrocaulus. |
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Definition
| A chinous sheath that covers the hydrocaulus. |
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Term
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Definition
| The mouth is located on a conical elevation called the hypostome. |
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Term
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Definition
| Lobes around the margin of scyphozoan medusae. |
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Term
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Definition
| Groupings of nerves in sense organs that house chemoreceptors, statocysts, and ocelli. |
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Term
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Definition
| Asexual reproduction. Spontaneous transverse segmentation of the body. |
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Term
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Definition
| A ciliated groove that creates the water current into the pharynx. |
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Term
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Definition
| Acontia threads at lower ends of septal filaments may protrude through the mouth to help secure prey. |
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