Answer:
(d) Filtration
of blood takes place at Malpighian body.
Malpighian body or
corpuscle comprises of glomerulus and Bowman's capsule.
Filtration
of blood takes place in glomerulus through glomerular filtration.
In which
blood enters in the glomerules through an afferent arteriole and leaves it through
efferent arteriole.
Proximal
Convoluted Tubule (PCT), is lined by cuboidal epithelium cells bearing brush
border and allows the reabsorption of salts by active transport.
Distal Convulated
Tubule (DCT), allows conditional reabsorption of 
and
water and selective secretion of H , 
, 
to
maintain pH and Na ? K balance in blood.
Collecting Duct
extends from cortex of kidney to the .inner part of medulla. Large amount of
water is reabsorbed from this region to produce the concentrated urine.
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