The octopus is one of the most complex creatures in the ocean, and because its blood is blue, it is also known as the noblest ocean aristocrat in Europe. The amazing thing about the octopus is that its blood is blue and it has three hearts. The large heart is used for cardiovascular circulation, while the two small hearts are mainly responsible for supplying strontium for blood supply and respiration. At the same time, its eight claws are rich in nerves and suckers. 1. Why does the octopus have three hearts?

Why does the octopus have three hearts? It all starts with the fact that octopus blood is blue. We all know that the blood of many animals is red because of ferritin. The blue color of octopus blood is due to copper protein. When copper corrodes, it turns blue-green, so octopus blood is blue. When the octopus's blood evolves into copper-containing hemocyanin, it requires a higher oxygen supply, because the oxygen production capacity of copper-containing protein is worse than that of ferritin. Therefore, octopuses are severely hypoxic, so they can only evolve three hearts to meet their oxygen supply needs. 2. The use of the three hearts of the octopus

The three hearts evolved by the octopus can meet the body’s oxygen supply needs and can also speed up blood circulation. The three evolved hearts are one large and the other two small. The larger heart is mainly responsible for supplying blood to the entire body, also called the body heart; while the two smaller ones are mainly responsible for providing blood transportation and movement to the octopus's gills, called gill hearts. Each heart does its own job, providing blood and oxygen to the body.

Due to the needs of the body, the octopus evolved into three hearts to provide the body with oxygen and blood circulation. One big heart is responsible for blood flow throughout the body, and two small hearts are responsible for blood flow in the gills. In addition to these, the octopus is also very smart, because its brain has two independent systems, one is responsible for normal brain operations; and the other is responsible for the sensory system of the touch on the body. So this is why octopuses are very sensitive to changes in their surrounding environment.