¿why Octopus have three hearts?

Question

I can read in books than octopus has three hearts, but no one says the reason. ¿Is there any special reason for this?

Answer 1

Cephalopods generally have high metabolic rates and active lifestyles. Haemocyanin is an oxygen-carrying pigment in their bloodstreams, which never seems to be present in concentrations that will transport more than 4–5 vols % of oxygen. As a result, hearts must have very high cardiac outputs, and more hearts may help with this function.

Also, the hearts perform specific functions. For example, a branchial heart (also called the gill heart) pumps blood from the body up to the gills to be oxygenated. The systemic heart and pumps oxygenated blood from the gills to the rest of the body.

Answer 2

An octopus's body has a lot of "parts". It has to send blood to its two gills, as well as to everywhere else. One heart is not strong enough to send all the blood to all those places, and thus God decided to give them 3 hearts to give that extra boost.

For more details, read everything here: http://www.wonderquest.com/ivy-octopus.htm (you have to scroll down and find the question with the octopus picture.)

:) :)

Answer 3

Backup, probably. Why do we have 2 kidneys?