Stenosis / narrowing shown experimentally in fluid filled silicone tube.
Simple experiment to show how dissolved substances--salts, sugars, metals and minerals, found in the blood and all body fluids assist circulation due to the affect of gravity on density imbalance due to evaporation from the breath, respiratory tract, skin, eyes and hair.
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This flow and return system shown experimentally in open-ended soft wall silicon tubing filled with water suspended 2 metres vertically by the centre with both open ends immersed in the water filled bottles, one of which has yellow food colouring added to show a return flow and to show clearly the narrowing caused by the tension applied to the water inside the tube and bottles.
Red coloured saline is introduced at the top of the suspended loop of tubing via a T junction and a syringe body to initiate the flow and return circulation, red representing the arterial blood flow in humans and all animals. And the phloem vessels in plants and trees. Yellow representing the venous return flow and the xylem return flow in plants and trees.
One of the objectives of the experiment is to show how solutes / dense substances alter the fluid tension on the inside walls of the silicon tubing filled with water, which is by no means as pliable as the majority of veins in the human body.
At the same time showing how increasing the density of the fluids at the upper part of the experiment, the canopy of trees and the upper part of the human body, --providing we are aligned correctly, either standing, sitting in an inclined posture or on an inclined bed with the head of the bed raised 6 / 15 cms (inclined bed therapy)
Not unlike trees and plants, we constantly evaporate water from the lungs with every breath exhaled and provide a constant stream of evaporation from the skin, eyes, hair, lungs, mouth, nasal cavities, throat, and sinuses.
Evaporated water does not contain salts, sugars, minerals, iron, and other metals. However, the fluid that it evaporates from does contain denser substances so it is impossible for evaporative water loss from the body or indeed the leaves of a tree without altering the density of the remaining fluids!
For every breath exhaled there must be a density change in the fluids at and below the surface of the lungs! The resulting denser solvent known as surfactant is oxygenated by the incoming air, its density is increased by evaporation from exhaled air and the density affords gravity to assist the flow of oxygenated denser blood back through the heart and into the arteries. Providing we are aware of this and align our body accordingly we can make use of the direction of gravity and enjoy the benefits from assisted circulation.
However, if we spend many hours horizontal, renal function or kidney filtration is compromised and there is an inevitable accumulation of dense often-toxic substances that remain in the blood, lymph, nerve, brain and tissue fluids. On standing after sleeping horizontally there is an inevitable shift in the direction of gravity which is assisting the circulation but with a toxic overload heading towards the kidneys.
It is this sudden postural shift and its affect on denser fluids towards the bladder that is considered as a mechanism for applying internal tension to the blood within the venous return flow, causing the origin of stenosis / narrowing of the veins, recently discovered in patients with multiple sclerosis by Professor Paolo Zamboni.
Watch my other videos on fluid transport.
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Andrew K Fletcher