Class 11 Exam > Class 11 Questions > which of the following is exonephric nephridi...
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which of the following is exonephric nephridia ?
[CPMT - 75]
- a)Pharyngeal nephridia
- b)Septal nephridia
- c)Integumentary nephridia
- d)Integumentary and pharyngeal nephiridia
Correct answer is option 'C'. Can you explain this answer?
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which of the following is exonephric nephridia ?[CPMT - 75]a)Pharyngea...
Integumentary nephridia are exonephric nephridia.
Explanation:
Nephridia are excretory organs found in various invertebrates such as annelids, mollusks, and arthropods. They are responsible for removing waste products from the body and maintaining osmotic balance.
There are three types of nephridia based on their position and structure: pharyngeal nephridia, septal nephridia, and integumentary nephridia.
- Pharyngeal nephridia: Pharyngeal nephridia are found in the pharyngeal region of some invertebrates. They are responsible for excreting metabolic waste products from the pharynx. They are endonephric nephridia, meaning they open into the pharynx.
- Septal nephridia: Septal nephridia are found in the septa or partitions between segments in segmented worms such as earthworms. They are responsible for excreting metabolic waste products from the coelomic fluid. They are also endonephric nephridia, as they open into the coelom.
- Integumentary nephridia: Integumentary nephridia are found in the body wall or integument of certain invertebrates. They are responsible for excreting waste products through small pores on the body surface. They are exonephric nephridia, meaning they open to the outside of the body.
Therefore, the correct answer is option 'C' - Integumentary nephridia. These nephridia are exonephric in nature as they open to the outside of the body through small pores on the body surface.
Explanation:
Nephridia are excretory organs found in various invertebrates such as annelids, mollusks, and arthropods. They are responsible for removing waste products from the body and maintaining osmotic balance.
There are three types of nephridia based on their position and structure: pharyngeal nephridia, septal nephridia, and integumentary nephridia.
- Pharyngeal nephridia: Pharyngeal nephridia are found in the pharyngeal region of some invertebrates. They are responsible for excreting metabolic waste products from the pharynx. They are endonephric nephridia, meaning they open into the pharynx.
- Septal nephridia: Septal nephridia are found in the septa or partitions between segments in segmented worms such as earthworms. They are responsible for excreting metabolic waste products from the coelomic fluid. They are also endonephric nephridia, as they open into the coelom.
- Integumentary nephridia: Integumentary nephridia are found in the body wall or integument of certain invertebrates. They are responsible for excreting waste products through small pores on the body surface. They are exonephric nephridia, meaning they open to the outside of the body.
Therefore, the correct answer is option 'C' - Integumentary nephridia. These nephridia are exonephric in nature as they open to the outside of the body through small pores on the body surface.
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