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Excretory System in Humans

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Question

Given alongside is a highly simplified (but also somewhat wrong) diagram of the human kidney cut open longitudinally. Answer the questions that follow.
Define excretion.

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Solution

Excretion is the removal of substances that have no further use in the body or are harmful.

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Q. Given alongside is a highly simplified (but also somewhat wrong) diagram of the human kidney cut open longitudinally. Answer the questions that follow.
Mention two functions of the kidney.

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Why does the cortex of the kidney show a dotted appearance?

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Q. 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'.

Q. Given below is a diagram of a human kidney cut open longitudinally Answer the following:
Figure

(i) Given definition of excretion.
(ii) Name the unit of kidney.
(iii) Why does the cortex of kidney show dotted appearence.
(iv) List the functions of the kidney.

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