Which Octopus have three heart?

Most people are surprised to learn that octopuses have three hearts instead of just one like humans. These fascinating creatures belong to the class Cephalopoda, which also includes squids and cuttlefish. Their unique circulatory system is one of the main reasons they are able to survive and move efficiently in the deep oceans.

Out of the three hearts, two are branchial hearts and one is a systemic heart. The branchial hearts are located near the gills. Their main job is to pump deoxygenated blood through the gills, where the blood picks up oxygen from the water. After that, the oxygen-rich blood is sent to the systemic heart. The systemic heart then pumps this oxygenated blood throughout the rest of the body, supplying energy to the octopus’s muscles, brain, and organs.

What makes octopuses even more special is the type of blood they have. Unlike humans, who use iron-based hemoglobin, octopuses have copper-based hemocyanin in their blood. This gives their blood a bluish color instead of red. Hemocyanin works better than hemoglobin in cold and low-oxygen environments, which is very useful for deep-sea living.

Another interesting fact is that when an octopus swims, its systemic heart actually stops beating. This is why octopuses prefer crawling rather than swimming for long distances—it saves them energy and reduces strain on their circulatory system.

Having three hearts is just one of the many incredible adaptations of octopuses. They are known for their intelligence, problem-solving skills, ability to camouflage, and flexibility. All these features, along with their efficient circulation, help them thrive as one of the most unique creatures of the ocean.

In short, the three-heart system of octopuses is a perfect example of how nature designs organisms in remarkable ways to fit their environment. It ensures that their bodies get enough oxygen to support their active lifestyles in the ocean’s challenging conditions.