EVERYDAY SCIENCE

Detailed explanation-1: -Whales and dolphins are mammals and breathe air into their lungs, just like we do. They cannot breathe underwater like fish can as they do not have gills. They breathe through nostrils, called a blowhole, located right on top of their heads.

Detailed explanation-2: -Dolphins are mammals, not fish. Unlike fish, who breathe through gills, dolphins breathe air using lungs. Dolphins must make frequent trips to the surface of the water to catch a breath. The blowhole on top of a dolphin’s head acts as a “nose, ” making it easy for the dolphin to surface for air.

Detailed explanation-3: -The two aquatic animals which have no gills are dolphins and whales. These animals must come to the surface in order to breathe as they cannot breathe underwater without gills.

Detailed explanation-4: -What makes a marine mammal a marine mammal? They must meet the characteristics of all mammals-they breathe air through lungs, are warm-blooded, have hair (at some point during life), and produce milk to nurse their young-while also living most or all of their lives in or very near the ocean.

Detailed explanation-5: -Most mammals breathe through their mouths and noses and send oxygen to their body via the lungs. A few aquatic animals, including sea cucumbers and catfish, breathe through their intestines, and the intestinal tissues of humans can readily absorb pharmaceuticals.