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Hello, the exchange of substances between cells and blood, which is the most important function of the circulatory system, takes place in capillaries. Capillaries, which are thought to have a total surface area of ​​500-700 square meters in the body, perform this function.
fulfills. Exchange of substances between capillaries and cells,
It takes place in the tissue fluid environment. tissue fluid; in the intercellular space
Many organic and inorganic substances that can escape from the capillaries in
It is the liquid that contains the substance. Nutrients, urea, uric in tissue fluid
metabolism products such as acid, creatine, various ions, water, respiratory gases
(O2, CO2) is present. Red blood cells and large blood proteins in tissue fluid
not found.
Blood pressure is the fluid pressure created by the contraction of the heart. capillaries
It enables the passage of water and substances from the blood inside to the tissue fluid, which is the intercellular fluid. Matter transitions; blood pressure, protein in the blood
between the osmotic pressure and the osmotic pressure of fluids between tissues
makes a difference.
In capillary blood vessels, from the artery end to the vein end
As you progress, blood pressure decreases. But blood protein osmotic pressure, capillary
is constant throughout the veins. blood pressure from protein osmotic pressure
where it is large, it transfers nutrients and nutrients from the capillaries to the tissue fluid.
matter migration; In places where protein osmotic pressure is high,
The passage of waste materials into the capillary is accelerated. Occurs in capillaries
These events that explain matter exchange are called the Starling Hypothesis.
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#Starling Hypothesis Animation
#Exchange mechanism in capillaries