Explain:-
1. Shizocoelomates.
2. Enterocoelomates.
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(a)
Schizocoely (adjective forms: schizocoelous or schizocoelic) is a process by which some animal embryos develop. Animals which develop through schizocoely are known as schizocoelomates. Schizocoely occurs when a coelom (body cavity) is formed by splitting the mesodermal embryonic tissue.[1]
Schizocoelous development is typically attributed to protostomes:[1] phyla Mollusca, Annelida, and Arthropoda, but some deuterostomes can exhibit schizocoely as well.[citation needed]
The term refers to the order of organization of cells in the gastrula leading to development of the coelom. In these three phyla of organisms, the mesoderm (the middle germ layer) forms as a solid mass of migrated cells from the single layer of the gastrula. The new mesoderm then splits, creating the pocket-like cavity of the coelom.
(b)
Enterocoely (adjective forms: enterocoelic and enterocoelous) is a process by which some animal embryos develop. In enterocoely, a mesoderm(middle layer) is formed in a developing embryo, in which the coelom forms from pouches "pinched" off of the digestive tract (also known as the embryonic gut, or archenteron). This type of coelom formation occurs in deuterostome animals, which for this reason are also known as enterocoelomates.
Enterocoelous development begins once the embryo reaches the gastrula phase of development. At this point, there are two layers of cells: the ectoderm(outermost) and the endoderm (innermost) layers. The mesoderm begins to form as two "pockets" of tissue (one above the endoderm, and one below) are formed via folding of the endoderm. These "pockets" begin to grow larger, and as they do so, they extend towards each other. When the two "pockets" of cells meet, the mesoderm is formed – a complete layer of tissue right in between the endoderm and ectoderm layers. This then leads to the formation of a coelom.
Enterocoelous development is the stage of embryological development of deuterostomes in which the coelom forms. The stage starts with the gastrula; as the archenteron forms, pockets of migrating cells also form, creating another layer between the endoderm and ectoderm, the mesoderm. These pockets gradually expand to form the coelom.[1]
Schizocoely (adjective forms: schizocoelous or schizocoelic) is a process by which some animal embryos develop. Animals which develop through schizocoely are known as schizocoelomates. Schizocoely occurs when a coelom (body cavity) is formed by splitting the mesodermal embryonic tissue.[1]
Schizocoelous development is typically attributed to protostomes:[1] phyla Mollusca, Annelida, and Arthropoda, but some deuterostomes can exhibit schizocoely as well.[citation needed]
The term refers to the order of organization of cells in the gastrula leading to development of the coelom. In these three phyla of organisms, the mesoderm (the middle germ layer) forms as a solid mass of migrated cells from the single layer of the gastrula. The new mesoderm then splits, creating the pocket-like cavity of the coelom.
(b)
Enterocoely (adjective forms: enterocoelic and enterocoelous) is a process by which some animal embryos develop. In enterocoely, a mesoderm(middle layer) is formed in a developing embryo, in which the coelom forms from pouches "pinched" off of the digestive tract (also known as the embryonic gut, or archenteron). This type of coelom formation occurs in deuterostome animals, which for this reason are also known as enterocoelomates.
Enterocoelous development begins once the embryo reaches the gastrula phase of development. At this point, there are two layers of cells: the ectoderm(outermost) and the endoderm (innermost) layers. The mesoderm begins to form as two "pockets" of tissue (one above the endoderm, and one below) are formed via folding of the endoderm. These "pockets" begin to grow larger, and as they do so, they extend towards each other. When the two "pockets" of cells meet, the mesoderm is formed – a complete layer of tissue right in between the endoderm and ectoderm layers. This then leads to the formation of a coelom.
Enterocoelous development is the stage of embryological development of deuterostomes in which the coelom forms. The stage starts with the gastrula; as the archenteron forms, pockets of migrating cells also form, creating another layer between the endoderm and ectoderm, the mesoderm. These pockets gradually expand to form the coelom.[1]
SwaggerVishesh:
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Hy Dear
1. Shizocoelomates :- Any invertebrate animal that possesses a schizocoel, a coelom formed through the splitting of the mesodermal mass, the middle germ layer in embryonic development.
2. Enterocoelomates:- Any animal in which the mesoderm-lined body cavity arises in the embryonic stage as an outpocketing of the developing gut.
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