answersLogoWhite

0

Most fishes never solved the problem and that's why their blood pressure is low. The octopus managed a fairly good solution by evolving three hearts. It's got two hearts to force blood through the two gills and then a main heart to force the blood everywhere else. They have another problem, though, that they share with lobsters and insects (but not fishes). The red blood cells are not equipped with hemoglobin (like ours and fish are) but rather with a poor oxygen carrier, called hemocyanin.

User Avatar

Wiki User

17y ago

What else can I help you with?