aquaticanimals aquaticbiology biological biomedicalengineering cardiopulmonarysystem cardiovasculardiseases comparative comparativephysiology computersimulation congestive congresses diagnosis exercise exercisetest exercisetests heartfailure lungdiseases marinebiology marineinvertebrates models osmoregulation pathophysiology physicalexertion physiologicalaspects physiology physiopathology pulmonaryfunctiontests regulation respiration respiratorytherapy vertebrates water-electrolytebalance(physiology)