difference Between annelids and notochord
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Chordates derive their name from one of their synapomorphies, or derived features indicating their common ancestry. This is the notochord , a semi-flexible rod running along the length of the animal. In those chordates which lack bone, muscles work against the notochord to move the animal. All chordates have a notochord at some stage in their lives, but in some (such as tunicates) the notochord is lost in the adult, whereas in others (such as thevertebrates) the notochord is present in the embryo, but in later stages is largely replaced and surrounded by the vertebrae, or backbones.
The notochord runs beneath the dorsal nerve cord, which is another chordate feature. This is in contrast to organisms such asannelids and arthropods, in which the main nerve cord is ventral. The chordate nerve cord is hollow, with pairs of nerves branching from it at intervals and running to the muscles. The anterior (forward) end of the nerve cord is often enlarged into a brain.
The notochord runs beneath the dorsal nerve cord, which is another chordate feature. This is in contrast to organisms such asannelids and arthropods, in which the main nerve cord is ventral. The chordate nerve cord is hollow, with pairs of nerves branching from it at intervals and running to the muscles. The anterior (forward) end of the nerve cord is often enlarged into a brain.
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The animal has a cord or backbone in their body structure are chordates. Contrary, Non-chordates are the animals without backbone or notochord, this the vital difference between chordates and non-chordates is that the.
These animals belong to the different phyla of the animal kingdom. Also being same at the multicellular level, there is a lot of difference betweenpatterns of organization of cells in this kingdom. Lower animals like coelenterates, sponges differ in cellular level of organization, at the organ level (radial and bilateral) Platyhelminthes and other members differ.
While higher animals like arthropods, annelids, mollusks, comes under Non-chordate and Aves, Reptiles, mammals fall under chordates, they all differ in some of their special physiological function and other unique features like body symmetry, digestive, circulatory or reproductive system, etc.
The design of classifying, the animal kingdom is broadly divided into several major groups called phyla. Till yet there are approximately 30 animalphyla recognized. The last and the major group of the animal kingdom was the phylum Chordata.
These animals belong to the different phyla of the animal kingdom. Also being same at the multicellular level, there is a lot of difference betweenpatterns of organization of cells in this kingdom. Lower animals like coelenterates, sponges differ in cellular level of organization, at the organ level (radial and bilateral) Platyhelminthes and other members differ.
While higher animals like arthropods, annelids, mollusks, comes under Non-chordate and Aves, Reptiles, mammals fall under chordates, they all differ in some of their special physiological function and other unique features like body symmetry, digestive, circulatory or reproductive system, etc.
The design of classifying, the animal kingdom is broadly divided into several major groups called phyla. Till yet there are approximately 30 animalphyla recognized. The last and the major group of the animal kingdom was the phylum Chordata.
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