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Renal tubes consists of what?
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The proximal end of a renal tubule consists of what?
- Bowman's capsule (renal capsule) - a duble layered cup.
- Glomerulus - tangle of capillaries within the capsule.
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The distal end of a renal tubule consists of what?
- Proximal concoluted tubule.
- Intermediate segment (loop of Henle)
- Distal convoluted tubule.
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What is the functions of the renal corpuscle?
pressure filtration of the blood.
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What is the function of the tubule?
selective resorption and secretion.
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What criteria are nephric tubes classified?
osmoregulatory demands of particular environments.
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What are the three different types of nephric tubes?
- Large renal capsule
- Small renal capsule, short distal convoluted tubule
- Relatively large renal capsule, long intermediate segment ( loop of hinle)
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Describe Type 1 : large renal capsule tubules.
- Large amount of filtrate, therefore of water output.
- Found in freshwater teleosts, elasmobranchs, and amphibians.
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Describe Type 2 : small renal capsule, short distal convoluted tubules.
- Small amount of water output.
- Marine teleosts, reptiles.
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Describe Type 3: relatively large renal capsule, long intemediate segment (loop of henle).
- Large amount of water filtrate.
- Long loop of henle means high water resorption (especially important for desert adaptations.)
- Mammals, birds.
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