Results for “how many hearts does an octopus have” · retrieved September 22, 2026
An octopus has three hearts.
An octopus has three hearts that work together as part of a single, coordinated circulatory system. Two branchial (or gill) hearts are responsible for pumping deoxygenated blood to the gills to pick up oxygen. Once oxygenated, the blood is pumped to the rest of the body by a single, larger systemic heart. This specialized system is necessary because octopuses use copper-based hemocyanin to transport oxygen, which is less efficient than the hemoglobin found in vertebrates, requiring higher pressure to circulate effectively.
Answer details
Branchial hearts
Two branchial hearts, also known as gill hearts, pump deoxygenated blood through the gills to be oxygenated.
Systemic heart
One systemic heart pumps the oxygenated blood from the gills throughout the rest of the octopus's body.
Reason for three hearts
The three-heart system compensates for the lower efficiency of hemocyanin, the copper-rich protein that transports oxygen in their blood.
Sources 8
About this answerHow Many Hearts Does an Octopus Have? | Anatomy, Facts, & More | Britannica
An octopus has three hearts, facilitating efficient nutrient and oxygen delivery throughout its eight-armed body. It has two branchial hearts, which are specifically tasked with pumping blood through the gills, where the blood is supplied with oxygen. These complement the main systemic heart, which pumps oxygenated blood to the rest of the octopus’s body.
August 28, 2025
How many hearts does an octopus have? | Live Science
Octopuses are iconic for their eight arms. But how many hearts does an octopus have?...It turns out that an octopus has three hearts, Kirt Onthank, an octopus biologist at Walla Walla University in Washington, told Live Science. The same holds true for their closest relatives, squid and cuttlefish....The octopuses' largest heart, the systemic heart, is located in the middle of the mollusk's body. It pumps oxygenated blood around the body, but not
March 4, 2023
How many hearts does an octopus have?
As if these tentacled wonders weren’t already alien enough, the octopus' three hearts and blue copper-rich blood seals the deal....Octopuses have three hearts: one pumps blood around the body; the other two pump blood to the gills. The reason for this impressive cardiac hardware probably comes down to the unusual composition of their blood....that have iron-...haemoglobin packed into red...cells, octopuses – along with some tarantulas, scorpions
March 25, 2018
How many hearts does an octopus have? Inside the creature's anatomy
How many hearts does an octopus have?...Octopuses have three hearts. One heart pumps blood throughout the body and the other two move blood to the gills, according to the nonprofit National Wildlife Federation.
April 4, 2024
Hearts, and the Heartless, in the Animal Kingdom
You surely know that humans and gira es have just one heart, as most animals do-but not all. Octopuses and squids (animals called cephalopods) have three hearts. Two hearts pump blood to the gills to CEPHALOPODS Animals without backbones, including squids, octopi, and nautiluses. Cephalopods have symmetrical bodies, prominent heads, and tentacles. take up oxygen, and the other pumps blood around the body (Figure ) . Worms are also unusual, with f
October 2, 2020
What do the three hearts of an octopus actually do? The simple science behind its unusual blood, gills and powerful circulation
An octopus does not have three hearts just to sound unusual. Two branchial hearts send deoxygenated blood to the gills, while a systemic heart moves oxygenated blood around the body. Its blue, copper-based blood helps explain why this extra pumping matters....An octopus has eight arms, a large brain, blue blood and something that sounds almost made up: three hearts. But those three hearts are not three copies doing exactly the same job. Each h
August 9, 2026
Octopus Anatomy: Three Hearts, Blue Blood, Eight Arms and How an Octopus Compares to a Squid
Octopus anatomy is among the strangest of any animal. The octopus (order Octopoda) circulates blue, copper-based blood through three separate hearts, distributes two-thirds of its neurons into eight arms that move under separate neural control, sees in greyscale yet matches the colour of any background within a second, and squeezes its entire body through any opening that fits its single hard part: a parrot-like beak. The largest species, the gia
May 10, 2026
How many hearts can an octopus have?
The answer is simple, yet fascinating: an octopus hasthree hearts. This isn’t just a quirky fact; it’s a crucial adaptation that allows these remarkable creatures to thrive in their marine environment. Two of these hearts, calledbranchial heartsorgill hearts, are dedicated to pumping blood through thegills, where the octopus absorbs oxygen from the water. The third, asystemic heart, then circulates this oxygenated blood throug
May 4, 2025
Keep exploring
Related on this site
This page was prepared by Seeked from live retrieval on September 22, 2026 and is not continuously updated. Run a fresh search for the latest, or to inspect each source.