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Orca Whales

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The phylum of Orca Whales are Chordata. The subphylum is vertebrata. Animals of the Chordata family have four key features: notochord, dorsal hollow nerve cord, pharyngeal slits, and post-anal tail. Notochords are a flexible rod-shaped structure that is found in the embryonic stage of development along in the adult stage of some chordate species. This feature is located within the digestive tube and the nerve cord; it provides skeletal support through the length of the body. The dorsal hollow nerve cord comes from the ectoderm that rolls into a hollow tube during the development stage. The ectoderm is an outer layer of three tissues within the embryo that produces the epidermis and nervous system. This feature is usually located dorsally near …show more content…

Jawless fish are similar to other fish expect that did not evolve with any jaw; they instead use a circular sucker-like mouth to attach and suck the blood of their prey. An example would be the sea lamprey or eels. Cartilaginous fish have jaws but their skeleton is made of flexible cartilage, they don’t have bones. Examples of these animals are sharks, skates, and rays; these organisms are often the predator hunting for their food. Bony fish are the largest class of vertebrate with about 29,000 species living in various environments like freshwater, coral reefs, and salt water. Bony fish have a skeleton made entirely of bone; they tend to have good eyesight too. These organisms have operculum which is a special flap that allows the fish to breathe without swimming by covering and protecting the gills. Salmon, cod, and sturgeon are examples of bony fish. Reptiles are a four-legged class of vertebrate who have adapted to living on land better than amphibians. These adaptions include some features like amniotic eggs, tough skin that is coated by keratin, and a respiratory system that has branching bronchial tubes within the lungs. Amniotic eggs are eggs that have amniotic fluid nourishing and protecting the embryo within the egg. Another feature that reptiles have are the capability to molt, which means they shed their outer skin, replacing it with new. Creatures that fall under reptiles are snakes, turtles, crocodiles and lizards. Amphibians are four-legged creatures that do not lay eggs with amniotic fluid; instead these eggs tend to dry out fast forcing the amphibian to lay their eggs in water. These creatures use their lungs to capture oxygen rather than using gills like fish. Amphibians interchange their environment between on land or in the water. Salamanders, toads, and frogs are examples of amphibians. Birds are

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