What is the circulatory system of a whale?

The circulatory system of a whale is a closed system featuring a powerful heart, typically with four chambers, which efficiently pumps oxygenated blood throughout its large body. Whales have a high volume of blood relative to their size, allowing for effective oxygen transport, especially during long dives. Their circulatory system also includes adaptations such as the ability to redirect blood flow away from non-essential organs during deep dives to conserve oxygen. Overall, it supports their immense size and aquatic lifestyle, enabling them to thrive in their ocean environments.