This is because the completely fused mantle and siphon of geoducks obscures the internal organs, with only the inhalant and exhalent
orifices and the pedal gape open to the surrounding environment.
Also sportive activities are able to facilitate the repultion of sodium from kidneys and consequently cause the decrease of liquid content and blood pressure(31)It seems that sportive activities are able to decrease the blood pressure by increasing the number of arterioles in active skeletal muscles, exhalent
increase, decrease of because of dilatability, resistance decrease against the blood flow, the improvement of bloody vessel neural regulation, decrease of environmental resistance, decrease of heart beat in activity and relaxation time 
We tagged blacklip abalone by inserting a plastic rivet into the open exhalent
hole furthest from the shell lip.
containing phagocytes in the gill lumen, which resulted in the obstruction of the water flow between the inhalant and exhalent
KEY WORDS: exhalent siphon area, Mytilus edulis, clearance rate, feeding activity, individual variability
2005) have described an alternative nonintrusive, but technically demanding method for estimating feeding rates of some species of active suspension-feeders in the field, including bivalves, by sampling inhalant and exhalent water masses using fairly precise techniques under water using SCUBA.
The effects of current speed on exhalent
siphon area and shell gape in blue mussels under constant seston regimes.
In the follow-up experiment to determine the possible source of this uncontrolled fertilization, it was found that a proportion of the eggs (varying between 30% and 95%) collected directly from the openings of exhalent
siphons had already been fertilized.
Movements of the cephalic and epipodial tentacles, rotations of the shell, and the exhalent
water current all produced fluctuations in oxygen concentrations at fixed points within the DBL.
2005) registered two peaks in exhalent
opening diameter of M.
1995), and probably detect clams by following plumes from exhalent
siphons, and/or coming in contact with siphons or siphon holes while probing sediment with appendages (Dare & Edwards 1981).