Proximal convoluted tubules (PCT)
PCT is portion attached to glomerular capsule. (Highly coiled)
It lie in cortex of kidney.
14mm long and 60 micrometer in diameter.
Brush border of microvilli on apical surface increase the surface area for reabsorption and secretion.
PCT is site for reabsorption of many substances filtered from blood such as -
Water, glucose, electrolytes, some amino acids and polypeptides.
About 65% water and upto 100% of some solute that pass through endothelial capsular membrane return to blood stream from PCT.
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