Does an octopus have a heart?

Answer 1

Yes. There is a located near the eyes of the octopus. Although it doesn't look like the mammalian brain that we know, it serves many the same functions that our brains do. There are also concentrations of ganglia (concentrations of neurons) in their arms - in fact 2/3 of the octopus's neurons are in their arms - so sometimes these often continue to move even after severed from the octopus body.

Interestingly, cephalopods (octopuses, squids, cuttlefish, and nautiluses) all exhibit high intelligence. Octopuses have been known to break out of aquarium tanks, and some studies indicate that they may even have personalities, which would be very unusual for an invertebrate animal.

Answer 2

Yes! Octopuses have three hearts, so they are even more incredibly cool than they were BEFORE you knew that! Two of the hearts pump blood through the gills, while another heart pumps blood through the body! See! There aren't many animals cool enough to do that!

Answer 3

no, the octopus has one brain inside its mantle.

Answer 4

A squid does have a brain and the brain is protected by a type of cartilage.

Answer 5

No