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Does blood move more rapidly or less rapidly after it flows from the capillaries into a vein?
Wiki User
∙ 11y ago
more rapidly, in the capillaries the blood cells flow in "single file". In the veins, multiple cells are allowed to pass at once
Wiki User
∙ 11y ago
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What structures control blood flow into capillary beds?
Elastic arteries are closest to the heart and expand and contract to control blood pumping from the heart and to maintain blood pressure. Next is muscular arteries that are mostly muscle that control flow to organs and tissues. Arterioles are nextand change size based on sypathetic or endocrine system (ex: fight or flight) and allow more or less blood to reach the capillaries and be exchanged. The blood then flows into the capillaries.
What is difference between capillaries and veins?
Capillaries are smaller, thinner and have less surface area than veins. Veins take blood to the heart, and capillaries are the thin tubes that connect the veins and arteries together.
Where do blood travel in spurts?
In the arteries, the pathways directly from the heart. Once the blood has perfused through the capillaries, the flow of blood would be more-or-less continuous.
When there is less oxyhemoglobin in the blood red blood cells produce 23-DPG This metabolic product?
enhances oxygen unloading at the systemic capillaries
What are the three tpyes of blood vessels and what do they do for the heart?
Arteries, veins and capillaries are the three major types of blood vessels. Capillaries are very small and only one cell thick to allow O2/CO2 exchange. Nutrients and wastes are also exchanged.
Does blood that flows into the right atrium contain a lot of oxygen and a little carbon dioxide?
Blood that flows into the right atrium is returning from the body and is deoxygenated. This means that it contains less oxygen and mostlycarbon dioxide.
What happens to capillaries when the body is at rest?
Capillaries supply blood to your tissues. When the body is at rest, less energy is being used so the capillaries are not as engorged in comparison to exercise. When one rests on harder surfaces, more pressure points occur that can close off capillaries and decrease blood flow. This can be amended with cushioning, or balanced by changing body position intermittently to allow easier circulation to these areas.
Why is it important that blood move very slowly through the capillaries?
Blood does not move slowly through the body. Blood moves very fast through the aorta. The speed of blood in aorta is about 50 cm per second. The speed of the blood through the cappilaries is very slow. It is only 0.05 cm per second. The The speed of blood in inversely proportional to the cross section of the diameter of the conducting blood vessels. The total diameter of the capillaries being very large, blood flows slowly through the capillaries. Although the diameter of the individual capillary is very small. But the length of the capillaries is very less. So this is not a problem, but an advantage. You get time for transfer of the nutrients and oxygen, as well as waste products of metabolism and carbon bi oxide. It takes only about 15 seconds for the blood to get back in the same chamber of the heart.
How does oxygen move from the capillaries to cells?
Through diffusion. There is less oxygen in the cells as opposed to the capillaries, so through simple diffusion, the oxygen goes from an area of high concentration to lower concentration.
How is spinal fluid formed?
It is formed by filtration of blood through the fenestrations of the choroidal capillaries in the choroid plexus. It is flows by the active transport of substances (Particularly sodium ions) across the choroid epithelium into the ventricle, water then flows passively across to maintain osmotic balance. It has also been shown that if the choroid plexus was removed the ventricles still produced substantial quantities of CSF, though less than normal. And is generally considered to be fluid movement from CNS capillaries into the parenchyma of the brain, and from there across the ependymal lining into the ventricle.
Why would bending your arm cut off circulation below the elbow?
because the blood vessles by your elbow get pinched by the bending so less blood flows
Does vasoconstriction conserve heat?
Yes, Vasoconstriction is the constricting (narrowing) of the arterioles supplying the the blood to capillaries close the skin surface. Heat is lost from the blood that does pass close to the surface (via radiation).Vasocontriction however, allows much of the blood to pass below the fatty adipose tissue rather than close to the surface.Vasodilation is the dilation (enlargening) of the arteriole that supplies blood to the capillaries. Therefore less blood flows beneath the adipose tissue, and much more flows close the skins surface. Much more heat is lost via radiation this way.Vasoconstriction is co-ordinated via the sympathetic nervous system (stimulates effectors like the smooth muscle)Vasodilation is co-ordinated via the parasympathetic nervous system (inhibits effectors like the smooth muscle)
