cnidaria Flashcards
Cnidocysts give rise to
nematocysts
Cnidaria are named after?
cnidocyst cells
Nematocysts are ___ cells
Stinging cells
Germinal layers formed in Cnidaria?
2
outer = ectoderm
inner = endoderm
Ectoderm in Cnidaria gives rise to
Nematocysts
Endoderm in Cnidaria gives rise to?
Digestive cells
Body and digestive cavity of Cnidarians is called?
Gastrovascular cavity
or
Enteron
Digestive system of diploblastic CNidaria is?
Sac-like
microscopic cnidarian example?
Hydra
macroscopic cnidarian example plus size?
branchioceranthus , 2m
Cnidarians exist in _ forms namely;
- Polyps (related to nutrition)
- Medusa (Related to reproduction Gonads)
Polyps are also called _
gastrozooids
Mouth of Cnidaria surrounded by __ related to defense and offense
Nematocyst
Cnidarians are __ (carni herbi omni)
carnivores
Cnidarians are also called
Coelenterata
Nervous system of Cnidaria formed ___ ___ in body wall
Irregular net / plexus
Colonial cnidarians produce hard exo-selekton formed of
CaCO3
Sessile cnidarians are?
Corals
Hydra
Obelia
Sea anemone
Colonial cnidarias are
Physalia
Vellela
mode of reproduction in Cnidarias
asexual + sexual both
mode of reproduction in Hydra?
Asexual
mode of reproduction in Obelia?
As + s both
The life cycle of Cnidaria is characterized by presence of__
alternation of generation
____ is characteristic feature of Cnidaria
Polymorphism
