MCQ
Choose the correct statement for Periplaneta americana
- AIt has $6$ muscular hearts
- BIt has $10$ thoracic segments
- CAnal style is present in both male and female
- ✓It is nocturnal and present in damp places
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$I.$ $PCT$ $II.$ $DCT$
$III.$ Loop of Henle $IV.$ Collecting duct
Which contributes most in maintaining $pH$ of blood?