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Answer :
| Alveoli | Nephrons |
|---|---|
| Structure | structure |
| Alveoli are tiny balloon-like structures present inside the lungs | Nephrons are tubular structures present inside the kidneys. |
| The walls of the alveoli are one cell thick and it contains an extensive network of blood cappillaries | Nephrons are made of glomerulus,bowmann's capsule,and a long renal tube |
| Alveoli | Nephrons |
| Function | Function |
| The exchange of O2 and CO2 takes place between the blood of the capillaries that surround the alveoli and the gases present in the alveoli. | The blood enters the kidneys through the renal artery.The blood is entered here and the nitrogeneous waste in the form of urine is collected by collecting duct. |
| Alveoli are the site of gaseous exchange | Nephrons are the basic filtaration unit. |