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Blood hydrostatic tends to force fluid out of the capillaries?
Wiki User
∙ 14y ago
Pressure is created by moving particles (fluid) bumping up against surfaces. In the case of blood hydrostatic pressure, blood is about 55% plasma and that plasma doesn't just flow down the length of the blood vessel but also pushes up against the sides of it creating blood hydrostatic pressure. Now there are different kinds of capillaries but in general they are all quite leaky. When you have fluid pressure pushing up against a leaky wall, some of that fluid is going to get out.
Wiki User
∙ 14y ago
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Why is the blood pressure lower in lung capillaries than body capillaries?
Because if blood pressure in lung capillaries was as high as it is in body capillaries, the hydrostatic pressure caused by this blood pressure would force blood plasma out of the capillaries into intracellular spaces (as is done in body capillaries) or into the alveoli. This would reduce the efficiency of gas exchange.
Which force favors blood filtration?
Capillary hydrostatic pressure and interstitial fluid osmotic pressure
What is the driving force in filtration?
Blood hydrostatic pressure
Blood flow through capillaries is controlled by?
Pressure. Capillaries are small so the force of blood coming from the heart is at greater pressure when it reaches the tiny capillaries. Pressure forces the diffusion of particles in and the osmotic diffusion of substances out (mainly metabolic wastes) to the veins.
What is the force of fluid pressing outward against the vessel wall?
hydrostatic pressure
What forces move fluid from intracellular to extracellular spaces?
Capillary hydrostatic force
What force is exerted on an object by a fluid when the fluid is not moving?
A static fluid will exert hydrostatic pressure on its container. Hydrostatic pressure is equal to the density ρ of the fluid multiplied by gravity g and the depth h:P = ρ g h
The inward pulling force of particles in the vascular fluid is called what?
interstitial hydrostatic pressure.
What is the gradient called that is the driving force for the movement of water and dissolved solutes from the arterial ends of blood capillaries?
The blood pressure in the capillaries at arterial end is about 25 to 30 mm of Mercury. The oncotic pressure of the plasma proteins is about 22 mm of mercury. So there is net force, which drives out the fluid in the interstitial space. The fluid is sucked back at the venous end of the capillaries by the oncotic pressure of the plasma proteins. It should be called as pressure gradient.
Because net inward pressure in venular capillary ends is less than net outward pressure of the arteriolar ends of capillaries?
The net inward pressure in venular capillary ends is less than the net outward pressure in arteriolar ends of capillaries because of two main factors: the hydrostatic pressure and the osmotic pressure. In venular capillary ends, the hydrostatic pressure is reduced due to the resistance of the venous system, while the osmotic pressure remains constant. In arteriolar ends, the hydrostatic pressure is higher due to the force exerted by the heart and the osmotic pressure remains the same. As a result, more fluid is filtered out of the capillaries at the arteriolar ends than is reabsorbed at the venular ends.
What is the main water-holding force in the blood capillaries?
protien in the blood plasma
What is the principle force that causes movement of fluid from tissues into capillaries?
hypertoni osmosis
