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Nephrostome occurs in Earthworm
- a)Septal nephridia
- b)Integumentary nephridia
- c)Pharyngeal and septal nephridia
- d)Pharyngeal and integumentary nephridia
Correct answer is option 'A'. Can you explain this answer?
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Nephrostome occurs in Earthworma)Septal nephridiab)Integumentary nephr...
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- a)Septal nephridia
n earthworm septal nephridia occur on the inter-seg�mental septum between 15th and 16th segments to the posterior side of the body. Each septal nephridium consists of nephrostome, neck, the body of nephridium and the terminal duct. It is also known as ciliated funnel or nephrostome. It is the proximal flattened funnel-shaped structure of the nephridium lying in the coelom.
So the correct answer is 'Septal nephridia'.
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Nephrostome occurs in Earthworma)Septal nephridiab)Integumentary nephr...
Nephrostome in Earthworm
The nephrostome in earthworms is part of the excretory system, specifically the septal nephridia.
Septal Nephridia
- Earthworms have specialized structures called nephridia for excretion.
- Nephridia are segmented, tube-like structures that function in excretion and osmoregulation.
- Septal nephridia are located in the septa, which are internal partitions that divide the segments of an earthworm's body.
Nephrostome Function
- The nephrostome is the ciliated funnel-like opening of the nephridia.
- It serves to filter waste products and excess fluids from the coelomic fluid of the earthworm.
- The nephrostome allows for the entry of waste materials into the nephridia for further processing and excretion.
Role in Osmoregulation
- In addition to excretion, the nephrostome also plays a role in osmoregulation.
- It helps maintain the balance of salts and water within the earthworm's body by regulating the composition of the coelomic fluid.
Conclusion
The presence of nephrostomes in the septal nephridia of earthworms highlights the importance of these structures in excretion and osmoregulation. They represent a key component of the earthworm's excretory system, allowing for the removal of waste products and the regulation of internal fluid balance.
The nephrostome in earthworms is part of the excretory system, specifically the septal nephridia.
Septal Nephridia
- Earthworms have specialized structures called nephridia for excretion.
- Nephridia are segmented, tube-like structures that function in excretion and osmoregulation.
- Septal nephridia are located in the septa, which are internal partitions that divide the segments of an earthworm's body.
Nephrostome Function
- The nephrostome is the ciliated funnel-like opening of the nephridia.
- It serves to filter waste products and excess fluids from the coelomic fluid of the earthworm.
- The nephrostome allows for the entry of waste materials into the nephridia for further processing and excretion.
Role in Osmoregulation
- In addition to excretion, the nephrostome also plays a role in osmoregulation.
- It helps maintain the balance of salts and water within the earthworm's body by regulating the composition of the coelomic fluid.
Conclusion
The presence of nephrostomes in the septal nephridia of earthworms highlights the importance of these structures in excretion and osmoregulation. They represent a key component of the earthworm's excretory system, allowing for the removal of waste products and the regulation of internal fluid balance.
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