A
B-
С
D-
1. Label the parts numbered B and D.
2. What prevents the back flow of fluid from part C to part B?
3. Why is part C contractile in nature?
4. Name two main organic constituents of the fluid that flows down the part labelled B.
5. Name the structural unit of part A.
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1. Cortex; 2. Medulla; 3. Pelvis; 4. Ureter.
(ii) The medulla consists of several medullary which are striped in appearance because they contain microscopic coiled tubes called nephrons.
(iii Fluid that passes down from the renal pelvis to the ureter is urine formed by millions of nephrons. The main nitrogenous waste present in the urine is urea.
(iv) The nephron is the structural and functional unit.
(v) 1. Ultrafiltration 2. Selective Readsorption.
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