Examples of interstitium in the following topics:
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- When moving from the bloodstream into the interstitium bulk flow is termed filtration, which is favoured by blood hydrostatic pressure and interstitial fluid oncotic pressure.
- Alternatively when moving from the interstitium into the bloodstreatm the process is termed re-absorption and is favoured by blood oncotic pressure and interstitial fluid hydrostatic pressure.
- Re-absorption is a two-step process beginning with the active or passive extraction of substances from the tubule fluid into the renal interstitium, and then the transport of these substances from the interstitium into the bloodstream
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- The process depends on the difference of gradients between the interstitium and blood, with molecules moving to low concentrated spaces from high concentrated ones.
- Movement from the bloodstream into the interstitium is favoured by blood hydrostatic pressure and interstitial fluid oncotic pressure.
- Alternatively, movement from interstitium into the bloodstream is favoured by blood oncotic pressure and interstitial fluid hydrostatic pressure.
- Due to the pressure of the blood in the capillaries blood hydrostatic pressure is greater than interstitial fluid hydrostatic pressure promoting a net flow of fluid from the blood vessels into the interstitium.
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- Edema is caused by increased secretion of fluid into the interstitium or impaired removal of this fluid.