Molluscs Flashcards
locomotion in mollusca
sessile, sluggish-swift
diet of mollusca (4)
herbivores, detritivores, filter feeders and predatory carnivores
head-foot region (3 organs)
contains feeding, cephalic sensory and locomotor organs
visceral mass (4 organs)
contains digestive, circulatory, respirator and reproductive organs
mantle/ pallium
two folds of protective skin
mantle cavity
space between mantle and body wall
where are the gills (ctenidia) housed?
mantle cavity
the chief locomotor organ
the foot
radula
tongue like organ
odontophore
cartilage-like supportive structure
function of the foot
- attachment to substratum
- locomotion
- or both
- attachment of disc of limpets
- hatchet food of bivalves
- siphon jet of cephalopods
- cephalopod arms
modifications of the foot
function of the mantle
gas exchange
where do products of digestive, excretory and reproductive systems empty?
mantle cavity
ctenidia
gills housed in the mantle cavity
ciliary function
provides continuous water current
- respiratory
- waste elimination
- sensory detection
- gamete dispersal