Do dolphins have lungs?

Hint: Lungs are used by mammals to breathe. Dolphins' lungs are neither larger nor smaller than those of land mammals. Obviously, the amount of oxygen that can be stored and used is not determined by the size of the lungs.

Complete answer:
Dolphins, like other mammals, require air, particularly oxygen, to survive. Every living creature cannot exist without oxygen, which is one of the body's principal sources of energy. Dolphins, unlike fish, must frequently rise to the surface to breathe. They hold their breath underwater and return to the surface when they are out of breath to take in additional fresh air.
Every living creature cannot exist without oxygen, which is one of the body's principal sources of energy. The alveoli (air cells) in dolphin lungs are far larger than those in human lungs. Because most animals only have one layer of capillaries, dolphin lungs have two layers of capillaries. This design improves gas exchange efficiency.
As a result, the surface area of the lungs has been considerably enlarged, allowing for more rapid gas exchange. According to a new study, dolphins avoid decompression sickness, sometimes known as "the bends," when they dive deep below the water's surface. This is due to the enormous marine mammals' collapsible lungs. Dolphins can inhale and exhale two to three times faster than humans thanks to their lungs.

Note:
Dolphins breathe through their blowhole, which is located on the top of their head, unlike other animals which breathe through their nostrils and mouth. The blowhole will aid breathing at the water's surface, which is one reason for the discrepancy. Because the blowhole is located on top of the head, only a small portion of the head is necessary to break the water's surface and inhale air.