Coelenterata Flashcards
Hydra
Water serpent
Obelia
Sea fur
Physalia
Portugese man of war
Cyanea
Sun jelly
Aurelia
Moon jelly
Rhizostoma
Largest jellyfish
Gorgonia
Sea fan
Pennatula
Sea pen
Adamsia
Sea anemone
Tubipora
Organ pipe coral
Heliopora
Blue coral
Term Coelenterata given by
Leuckart
Term Cnidaria given by
Hyman
Totipotent cells in coelenterates
Interstitial cells
Cells exclusive to ectoderm of coelenterates
Cnidoblast cells and germ cells
Larva of coelenterates
Planula
Polyp form
- Asexual
- Mouth in hypostome
- Velum absent
- 24 tentacles
Medusa form
- Sexual
- Mouth in manubrium
- Velum is present
- 16 tentacles
Hydrozoa
- Diploblastic
- Ectodermal gonads
- Polyp and medusa
Scyphozoa
- Triploblastic
- Endodermal gonads
- Medusa present, Polyp absent
# Thick mesoglea
Anthozoa
- Triploblastic
- Endodermal gonads
- Polyp present, medusa absent
Only neurotoxic coelenterate
Physalia
Bioluminescent coelenterate
Aurelia
Proto-cooperation with hermit crab
Adamsia
Marine hydra
Proto-hydra
Most sensitive part of coelenterates
Hypostome
Function of pedal disc
- Adhesive substance for attachment
- Gas bubble for floatation
Hollow tentacles
Hydra
Solid tentacles
Obelia
Stenotele / Penetrant nematocyst
Injects hypnotoxin
Desmoneme / Volvent nematocyst
Captures prey
Stereoline glutinant
Small glutinant / Atrichous isorhiza
Streptoline glutinant
Large glutinant / Holotrichous isorhiza
Epithelio-muscular cells
Form longitudinal muscles
Epithelio-glandular cells
(Pedal disc secretions)
Endothelio-muscular cells
Form circular muscles
Endothelio-glandular cells
- Enzymatic glands help in extracellular digestion.
- Mucous glands secrete slimy fluid for lubrication and entangling prey.
Favorite food of hydra
Waterfleas (Cyclops and Daphnia)
Chemical stimulus to recognize waterfleas
Glutathione
Nutrient not digested by hydra
Starch
Galvanotaxis of hydra
Tentacle bends towards anode
Number of chromosomes in hydra
12
Fastest means of locomotion in hydra
Somersaulting
Slowest means of locomotion in hydra
Gliding