Respiration; buccal and opercular pumps
Respiration; buccal and opercular pumps
Respiration; buccal and opercular pumps
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How do we know about the existence of this dual pumping<br />
mechanism?<br />
The application of modern, sensitive, <strong>and</strong> stable pressure transducers has<br />
resulted in accurate pressure measurements in both the <strong>buccal</strong> <strong>and</strong><br />
<strong>opercular</strong> cavities.<br />
The recordings show that the gills have an appreciable resistance to water<br />
flow so that a differential pressure is always present, with the gradient<br />
from <strong>buccal</strong> to <strong>opercular</strong> cavity.<br />
In other words, pressure in the <strong>buccal</strong> cavity is nearly always positive<br />
with respect to pressure in the <strong>opercular</strong> cavity.
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