EXCRETORY SYSTEM
KIDNEY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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ridding the body of waste and toxic substances
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Take out the fluids
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receive a high blood flow
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None of the above
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Detailed explanation-1: -The kidneys act as very efficient filters for ridding the body of waste and toxic substances, and returning vitamins, amino acids, glucose, hormones and other vital substances into the bloodstream. The kidneys receive a high blood flow and this is filtered by very specialised blood vessels.
Detailed explanation-2: -Renal oxygen consumption and mitochondrial content are second only to the heart (Bhargava & Schnellmann, 2017). Renal blood flow (RBF) is very high: kidney is the most vascularized organ of the body, and kidneys receive 20-25% of the resting cardiac output, while their weight is less than 1% of body mass.
Detailed explanation-3: -The majority of blood flow to the kidney is directed to the cortex, with only a small proportion delivered to the medulla, where sodium transport by the thick ascending limb of the loop of Henle accounts for a high oxygen consumption.