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EXPLANATION OF HOW THE KIDNEY IS ADAPTED TO ITS
FUNCTIONS:
Its tubules are long and
coiled; providing a large surface area for efficient reabsorption and
enough time is allowed for useful products is allowed for them to be
reabsorbed.
The tubules are supplies
with blood capillaries that ensure constant removal of reabsorbed
substances hence creating room for more reabsorption.
The efferent vessels
leaving the glomerulus have a narrower lumen than the afferent tubule.
This helps to build up a higher pressure necessary for ultra-filtration.
There exists micro villi
in he inner surface of the epithelial lining of the proximal convoluted
tubules that provides a larger surface area for efficient reabsorption.
The cells in the proximal
convoluted tubule have many mitochondria; this provide energy for active
reabsorption of amino acids, mineral salts and glucose.
The loop of Henle has a U-
shape to ensure maximum absorption of water hence reducing its wastage.
The afferent vessel that
enters the kidney is highly branched to form glomerulus. This provide
large surface area for ample blood to flow into the kidney for
filtration.
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