Octopuses are mollusks, which means they are invertebrates. Compared with vertebrates, octopuses have a very different structure. For example, they have two memory systems and have a strong memory ability. For example, their number of hearts is different from that of vertebrates, because they have three hearts, which is different from that of most animals.
Octopus has three hearts, but these three hearts are different, one of them is called "body heart", which can be equivalent to the only heart of human beings and other animals; There are also two different hearts, called "gill hearts", which are similar to the function of human kidneys. As can be seen from the above description, the functions of the two types of hearts are different. There are two main functions of the gill heart, one is to supply blood, and the other is to filter the waste produced by the body. The body heart can be said to be the core part of the octopus body, their main function is to supply blood, but also to the octopus body blood supply, so as to maintain the vitality of the octopus.
As mentioned above, the body structure of octopus is quite special, with many outstanding characteristics. Besides having three hearts, they have eight legs. In fact, these legs can be said to be their tentacles, not what we usually call legs. Octopus legs will have a lot of suckers, these suckers have a very strong ability to attract prey and entangle, until the prey died because of suffocation, octopus will let go and eat them. Of course, these legs can play a role in movement as well as in predation.
