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. 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
28.5C: Phylum Chordata - Biology LibreTexts
Web1 day ago · During non-discussion weeks students will report to main room. 10419 DIS 202. F 11:15am - 12:05pm To Be Assigned. Aug 21 - Dec 4, 2024. Evans, G. Instruction Mode: In Person. Student will report to discussion rooms as directed by instructor. During non-discussion weeks students will report to main room. 10420 DIS 203. http://davidlnelson.md/Cazadero/FiveVertebrates.htm dallas museum of art jobs dallas tx
Human Skeleton Chapter 2 Support and Movement Zoology Class …
WebThe word "invertebrate" comes from the Latin word vertebra, which means a joint in general, and sometimes specifically a joint from the spinal column of a vertebrate. The jointed aspect of vertebra is derived from the concept of turning, expressed in the root verto or vorto, to turn. [5] The prefix in- means "not" or "without". 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 … WebSep 7, 2024 · The vertebrate heart performs the function of pumping the organism's life blood around its body. While similar in many ways, the hearts of different vertebrate classes possess different numbers of ... dallas museum of art donation request