Cnidaria Flashcards

1
Q

De to former af tilstande

A

Polyp og medusa

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2
Q

De 3 lag og hulrummet hedder?

A

Mesoglea, gastrodermis, epidermis og det glastrovasculare system

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3
Q

Fangecellerne på tentaklerne?

A

Nematocyster, der sidder i cnidocyter

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4
Q

Hvad bruger cnidaria til at orienterer sig?

A

Statolith

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5
Q

Hvad bruger de til at se?

A

Ocelli (Lys receptive)

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6
Q

Klasser og arter herunder

A

Medusoxoa - Hydrazoa: Hydra, - Storgopler: Øregopler, brændegopler
Cubozoa: Ikke vigtigt
Anthozoa: Sønellike, Dødninghånd, søfjer, Tealia felina

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7
Q

Hvor sidder sanseorganerne?

A

i Rhopalium

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8
Q

Hvad hedder larverne hos Cnidaria?

A

Planulalarve

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9
Q

Hvilke to klasser har rhopalium?

A

Scyphozoa og Cubozoa

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10
Q

Hvad kaldes “kroppen” af medusastadiet?

A

klokken

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11
Q

Karakteristika for Scyphozoa

A

Medusastadie kønnet, rhopalia, strobilisering/schyphistoma, planulalarve

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12
Q

Karakteristika for Cubozoa

A

Rhopalium, ingen strobilisering, klokken kurver indad ved åbning.

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13
Q

Karakteristika for Hydrozoa

A

Hydranth, perisarc/thecate (skjold af kitin), Stolon(“rødder”), velum

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14
Q

Generel karakteristika

A

gastrovascular kanal, medusa/polypfase, klokke, manubrium, epidermis, gastrodermis, mesoglea, intet anus, planularve

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15
Q

Forklar befrugtning og dannelse af larve

A

Sæd og æg dannes i gonaderne, sæd transporteres igennem gastrovaskularrummet og ud i vandet, hunners æg transporteres ud i gastrovaskularrumet, hvor hunnen har opsamlet sæden. De befrugtede æg føres ud i furerne af mundarmene, og her dannes planularven i rugelommer.

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16
Q

Karakteristika for antozoa

A

Polypform, skeletdannelse