In the proximal convoluted tubule nearly 85% of the filtrate is reabsorbed back into the blood.
The proximal convoluted tubules have several adaptations to reabsorb substances into the blood, such as having epithelial cells. These cell possess microvilli to provide a larger surface area to reabsorb substances from the filrate.
The epithelialcells lining the proximal convoluted tubules have infoldings at their bases to give a large surface area to transfer reabsorbed substances into blood capillaries.
The epithelialcells lining the proximal convoluted tubules have a high density of mitochondria to provide ATP for active transport.
