explain why low capillary pressure is desirable
The blood is under low pressure once entering the capillary.
exchange of fluid that occurs across the capillary membrane between the blood and the interstitial fluid. This fluid movement is controlled by the capillary blood pressure, the interstitial fluid pressure and the colloid osmotic pressure of the plasma. Low blood pressure results in fluid moving from the interstitial space into the circulation helping to restore blood volume and blood pressure.
water and waste will move in capillary . water and waste will move in capillary .
The pressure in the tissue surrounding the capillary, called interstitial fluid pressure, causes fluids to enter the venous side of the capillary due to the pressure gradient. This pressure helps to balance the forces of filtration and reabsorption in the capillary beds.
An increase in capillary pressure will shift fluid into or out of the capillaries
Is exerted by blood pressure
Net hydrostatic pressure decreases along the length of a capillary due to resistance and filtration of fluid out of the capillary. In contrast, net osmotic pressure remains relatively constant along the capillary length, as proteins and solutes that contribute to osmotic pressure do not leave the capillary as easily.
Blood colloid osmotic pressure
net osmotic pressure
Hydrostatic pressure is high at the arterial end of a blood capillary because this is where blood enters the capillary under high pressure from the heart. This pressure helps to push fluid and nutrients out of the capillary and into the surrounding tissues. This process is essential for delivering oxygen and nutrients to cells and removing waste products.
The capillary oncotic pressure is higher because of the plasma proteins trapped within the capillaries. The high oncotic pressure pulls the water from from the interstitium into the capillary.
For a home air conditioning unit 35 psig low and 125 - 150 psig high (depending on outdoor temp) are desirable.