Vertebrates comprise all animal taxa within the subphylum Vertebrata (/ˌvɜːrtəˈbreɪtə/) (chordates with backbones), including all mammals, birds, reptiles, amphibians and fish. Vertebrates represent the overwhelming majority of the phylum Chordata, with currently about 69,963 species described. … See more The word vertebrate derives from the Latin word vertebratus (Pliny), meaning joint of the spine. Vertebrate is derived from the word vertebra, which refers to any of the bones or segments of the See more In addition to the morphological characteristics used to define vertebrates (i.e. the presence of a notochord, the development of a vertebral column from the notochord, a dorsal nerve cord, pharyngeal gills, a post-anal tail, etc.), molecular markers … See more The number of described vertebrate species are split between tetrapods and fish. The following table lists the number of described See more Nearly all vertebrates undergo sexual reproduction. They produce haploid gametes by meiosis. The smaller, motile gametes are spermatozoa and the larger, non-motile gametes … See more All vertebrates are built along the basic chordate body plan: a stiff rod running through the length of the animal (vertebral column and/or notochord), with a hollow tube of nervous tissue (the spinal cord) above it and the gastrointestinal tract below. See more External relationships Originally, the "Notochordata hypothesis" suggested that the Cephalochordata is the sister taxon to Craniata (Vertebrata). This group, called the … See more There are several ways of classifying animals. Evolutionary systematics relies on anatomy, physiology and evolutionary history, which is determined through similarities in … See more WebThere are four traditional classes of flatworms, the largely free-living turbellarians, the ectoparasitic monogeneans, and the endoparasitic trematodes and cestodes. Trematodes have complex lifecycles involving a molluscan secondary host and a primary host in which sexual reproduction takes place.
Phylum Platyhelminthes Biology for Majors II - Lumen Learning
WebNov 15, 2024 · There are four basic types of reptiles: crocodiles and alligators; turtles and tortoises; snakes; and lizards. Reptiles are characterized by their cold-blooded … WebFeb 13, 2024 · Definition. Any vertebrate, classified under subphylum Vertebrata, is an animal with a backbone. This group consists of several broad classes: fish, amphibians, birds, reptiles, and mammals. The word vertebrate refers to the bony vertebral column. All classes of vertebrate have developed brains, internal skeletons to which muscles can … ios jpg to heic
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WebApr 17, 2024 · There are several different types of vertebrae found within most vertebrates, named for the parts of the body they are located in. Cervical vertebrae At the base of the skull, the vertebral column starts with the cervical vertebrae. There are seven of these, and they are numbered C1 through C7. WebDec 9, 2024 · There are 7 living classes of vertebrates. What are the 5 categories of vertebrates? Vertebrate Category Vertebrates can be partitioned into 5 significant groups: fishes amphibians reptiles birds and mammalsAmphibians reptiles birds and mammals are ranked as classes. WebMar 5, 2024 · There are about 50,000 vertebrate species, and they are placed in nine different classes. Five of the classes are fish. The other classes are amphibians, reptiles, … ios keeps prompting for exchange password