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Body cavity of Ascaris is called pseudocoel because :-
- a)Not lined by coelomic mesoderm
- b)Not derived from blastocoel
- c)It have giant mesodermal cells
- d)Derived from archenteron
Correct answer is option 'A'. Can you explain this answer?
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Body cavity of Ascaris is called pseudocoel because :-a)Not lined by c...
A fluid-filled cavity, called the pseudocoelom, that arises from an embryonic cavity and contains the internal organs free within it.a fluid-filled body cavity, the pseudocoelom, which, unlike a true coelom, does not have a cellular peritoneal lining.
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Body cavity of Ascaris is called pseudocoel because :-a)Not lined by c...
Explanation:
Ascaris is a roundworm which belongs to the phylum Nematoda. It is a multicellular organism and like all other multicellular organisms, it has different body cavities for different organs. The body cavity of Ascaris is called a pseudocoelom because:
1. Not lined by coelomic mesoderm: The coelom is a body cavity lined by mesodermal cells. In the case of Ascaris, the body cavity is not lined by mesodermal cells but by a layer of mesenchyme. Therefore, the body cavity of Ascaris is not a true coelom.
2. Derived from blastocoel: In the early embryonic stage, the body cavity of an animal is formed from the blastocoel, which is a cavity within the blastula. In the case of Ascaris, the body cavity is not derived from the blastocoel, but from the space between the endoderm and mesoderm layers.
3. It has giant mesodermal cells: Ascaris has giant mesodermal cells that produce eggs and sperm, and these cells are not found in a true coelom.
4. Derived from archenteron: The archenteron is the primitive gut that forms during gastrulation. In the case of Ascaris, the body cavity is not derived from the archenteron but from the space between the endoderm and mesoderm layers.
Therefore, the correct answer is option A, i.e., the body cavity of Ascaris is called pseudocoel because it is not lined by coelomic mesoderm.
Ascaris is a roundworm which belongs to the phylum Nematoda. It is a multicellular organism and like all other multicellular organisms, it has different body cavities for different organs. The body cavity of Ascaris is called a pseudocoelom because:
1. Not lined by coelomic mesoderm: The coelom is a body cavity lined by mesodermal cells. In the case of Ascaris, the body cavity is not lined by mesodermal cells but by a layer of mesenchyme. Therefore, the body cavity of Ascaris is not a true coelom.
2. Derived from blastocoel: In the early embryonic stage, the body cavity of an animal is formed from the blastocoel, which is a cavity within the blastula. In the case of Ascaris, the body cavity is not derived from the blastocoel, but from the space between the endoderm and mesoderm layers.
3. It has giant mesodermal cells: Ascaris has giant mesodermal cells that produce eggs and sperm, and these cells are not found in a true coelom.
4. Derived from archenteron: The archenteron is the primitive gut that forms during gastrulation. In the case of Ascaris, the body cavity is not derived from the archenteron but from the space between the endoderm and mesoderm layers.
Therefore, the correct answer is option A, i.e., the body cavity of Ascaris is called pseudocoel because it is not lined by coelomic mesoderm.
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Body cavity of Ascaris is called pseudocoel because :-a)Not lined by c...
They have a pseudocoeloem, where the body cavity is not lined by the mesodermal layer
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Body cavity of Ascaris is called pseudocoel because :-a)Not lined by coelomic mesodermb)Not derived from blastocoelc)It have giant mesodermal cellsd)Derived from archenteronCorrect answer is option 'A'. Can you explain this answer?
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