How does the SCUBA diving equipment adapt us to swim like a fish?
GILLS Fish can take oxygen from water like our lungs can take oxygen from air. Our lungs can t take oxygen from water like a fish s gills so we carry our air with us in our air tanks and put our regulator in our mouth so we can breathe underwater. FINS We don t have fins to push us easily through the water like a fish, so we wear large scuba diving fins to swim underwater like a fish. SWIM BLADDER – Most fishes control floating and sinking with a little balloon inside their bodies called a swim bladder. The fishes can put air inside their swim bladders, which will make themselves float (positive buoyancy). The fishes can squeeze the air out of the swim bladders, which will make themselves sink (negative buoyancy). The fish easily float underwater (neutral buoyancy) by controlling the amount of air inside their swim bladder. We don t have a swim bladder and our lungs don t work like a swim bladder so we have to wear a buoyancy compensator (BC). By adding or releasing air from our BC we
