31. the two kidneys lie:
32. A kidney stone is
33. The yellow colour of urine of the vertebrates in due to
34. Lungs expel
35. In ornithin cycle which of the following waste are removed from the blood?
36. Main function of uriniferous tubules
37. Loop of henle and collecting ducts are locketed in kidney is
38. Peritubuler is in
39. The function of renin is
40. Which one of the following statement is impereble to water
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