pneumostome


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pneumostome

[′nü·mə‚stōm]
(invertebrate zoology)
The respiratory aperture of gastropod mollusks.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
After a 10-min acclimatization period, a general tactile stimulus was applied to the pneumostome as it attempted to open.
However, snails that did not attempt to open their pneumostome in the TS more than twice were not used.
cross laterally over the floor of the lung cavity towards the left at approximately the level of the anterior corner of the pneumostome (Fig.
The anterior corner of the pneumostome together with the lung floor are of particular interest because three different bands of muscle fibres converge there, one from above and two from below.
This band runs from the mantle collar (at the anterior corner of the pneumostome) across the middle of the right hand half of the mantle roof (Figs 2B, 2C, 4B) from one side to the other and disappears in the mantle roof in the vicinity of the spermatheca.
According to Lukowiak, the snails breathe through their skins when oxygen levels are high, but when oxygen levels drop the snails extend their pneumostomes above the water's surface to supplement the supply.
The team trained the snails to remember to keep their pneumostomes closed when oxygen levels were low by poking them with a stick every time they tried to open their pneumostomes.