Wikibooks: Adventist Youth Honors Answer Book/Nature/Cetaceans

• Format: Book
• Language: English
• Subjects: Pacific; baleen whales; Blue whale; Sperm whale; toothed whales
• Online Access: https://en.wikibooks.org/wiki/Adventist_Youth_Honors_Answer_Book/Nature/Cetaceans

honor header 2 Unknown Nature South Pacific Division =1. In what way is the Cetaceans family different from most other sea life?= The Cetacean family is different from most other sea life because Cetaceans are mammals. This means A They give birth to live babies. The largest whale is the Blue Whale and its newborn baby will be up to 7 meters long and weigh up to 2700 kg (about as much as two cars). The large whale mothers move to warm tropical waters to give birth and spend about six months there so their babies can grow a layer of fat (blubber) to help them survive the cold frigid waters where they live for the other six months. While in the warm waters the adult whales do not eat at all. B They feed their babies milk. The baby will drink 400 liters of milk and gain 90 kg a day for the first seven months of its life. C They have warm blood. A blue whale’s heart is the size of a small car and its aorta (the main heart artery) is the diameter of a basketball. D They breathe air just like us. This means that they must hold their breath while under the water. A Sperm Whale can hold its breath for 30 minutes. When they want to breathe they come to the surface blow out moist air from their lungs and snatch a new breath. Their nostrils are called blowholes. Baleen whales have two blowholes and toothed whales one blowhole. The whale hunters could tell what sort of whale it was by the shape of the spout blown out. E They have some hair on their bodies. You may not easily see the hair on a whale but most have small whiskers on the chin. In addition to the characteristics of mammals listed above cetaceans differ from other sea life in other ways as well. One of these differences between a cetacean and a fish is the shape of the tail. The tail of a fish is vertical and moves from side to side when the fish swims. The tail of a cetacean – called a fluke – is horizontal and moves up and down. =2. Explain the difference between Baleen and Toothed Whales.= =Baleen Whales= The baleen whales also called whalebone whales or ...