Nephron — Kidney Filtration
Bowman's capsule → tubules → collecting duct, with reabsorption + secretion sites.
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flowchart LR
A[Afferent arteriole] --> Glo[Glomerulus]
Glo --> Bow[Bowman's capsule]
Bow --> PCT["Proximal convoluted tubule<br/>(Na+, glucose, AA reabsorbed)"]
PCT --> Desc["Descending loop of Henle<br/>(H2O out)"]
Desc --> Asc["Ascending loop<br/>(Na+ K+ Cl- out)"]
Asc --> DCT["Distal convoluted tubule<br/>(Na+/Ca2+ aldosterone)"]
DCT --> Coll["Collecting duct<br/>(ADH → H2O / K+ H+)"]
Coll --> Bl[Renal pelvis →\nbladder]
Glo --> Eff[Efferent arteriole]
Eff --> Cap[Peritubular capillaries]
Cap -.->|reabsorption| PCT
Cap -.->|secretion| DCT