wear your heart on your sleeve. to make your feelings and opinions obvious to other people John's always worn his heart on his sleeve, so there's no doubt who he'll be supporting. See also: heart, on, sleeve, wear. Related vocabulary: wear something on your sleeve.
In many bivalves and snails, and in cephalopods, part of the mantle is modified into a siphon, which can be used to pump water through the mantle cavity for respiration, feeding and/or jet propulsion. Freshwater and marine mollusks have gills (called ctenidia) for respiration, located in the mantle cavity. In most bivalves, these are enlarged and serve to trap food particles as well (Morton 1983).
  The ciliary tracts of gills move strands of mucous with food particles attached to the mouth. From there, the food is moved by cilia to the stomach. So, if the cilia on â¦ the gills didn't work, the mollusk would not receive enough (if any) food.It would die of starvation.ephalopods (squid, octopuses, cuttlefish) also possess a chitinous beak. Unlike the closely related annelids, mollusks lack body segmentation. Development passes through one or two trochophore stages, one of which (the veliger) is unique to the group.