Why are the kidneys reduced to smaller size in birds?
Answers
Answer:-
The kidney size in birds are reduced due to the following reasons:-
# the kidney size in birds are reduced so that the kidney size matches with all the rest of it's organs which are also quite small in size.
#the kidney size is reduced in a bird so that the bird can easily fly without carrying much weightage.
#a bird usually requires less amount of water, so less amount of water is required to get filtered out of the birds excretory system thus
the kidney size in birds are much smaller.
# as the bird is quite small in size the amount of blood that needs to be filtered is also less therefore kidney sizes in birds are small.
( Main reason of reduced kidney in humans :-
Normally, kidneys are about the size of a fist or 10 to 12 cm in humans (about 5 inches). Kidney atrophy means that the kidney is smaller than normal. This can happen for two basic reasons. The first is that part of the kidney does not develop from birth (called a congenital problem) making a small kidney. This type of kidney atrophy or small kidney usually does not need any special treatment. The second type happens after birth, which can occur in one or both kidneys. This type of kidney atrophy is due to a lower blood supply to the kidney(s)and/or loss of nephrons, the basic working units of the kidneys. Chronic infections or blockage of the kidney can also result in kidney atrophy. A kidney that is smaller in size can lead to kidney disease. A greater decrease in kidney size, especially for both kidneys, can lead to kidney failure.)
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