Given alongside is a highly simplified diagram of the human kidney cut open longitudinally. Answer the questions that follow: [5 MARKS] (a) Define excretion. (b) Name the functional units of kidneys. (c) Why does the cortex of the kidney show a dotted appearance? (d) Mention two functions of the kidney. (e) Write two differences in the composition of the blood flowing through the blood vessels, 'A' and 'B'.

Given alongside is a highly simplified diagram of the human kidney cut

1.	Given alongside is a highly simplified diagram of the human kidney cut open longitudinally. Answer the questions that follow: [5 MARKS] (a) Define excretion. (b) Name the functional units of kidneys. (c) Why does the cortex of the kidney show a dotted appearance? (d) Mention two functions of the kidney. (e) Write two differences in the composition of the blood flowing through the blood vessels, 'A' and 'B'.
Answer» Given alongside is a highly simplified diagram of the human kidney cut open longitudinally. Answer the questions that follow: [5 MARKS] (a) Define excretion. (b) Name the functional units of kidneys. (c) Why does the cortex of the kidney show a dotted appearance? (d) Mention two functions of the kidney. (e) Write two differences in the composition of the blood flowing through the blood vessels, 'A' and 'B'.