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Question
Differentiate protonephridia from metanephridia.
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Solution
| Sr. No. | Protonephridia | Metanephridia |
| 1. | Primitive kidneys are protonephridia | Tubular excretory structures are |
| 2. | These are found in flatworms. | These are found in annelids and molluscs |
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Select the correct option from the codes given below.
Kidneys are vital organs for survival. Several factors like infections, injury or restricted blood flow to kidneys reduce the activity of kidneys. This leads to the accumulation of poisonous wastes in the body, which can even lead to death. In case of kidney failure, an artificial kidney can be used. An artificial kidney is a device to remove waste products from the blood through dialysis.
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OR
iii. In which part of the nephron does selective reabsorption take place? List the factors which the amount of water reabsorbed depends on.
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