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https://www.chegg.com/homework-help/questions-and-answers/valves-veins-support-theory-blood-moves-two-directions-vein-b-movement-blood-back-forth-ve-q6147339
Valves in the veins support the theory that: A: blood moves in two directions through the vein, B: movement of blood is back and forth through the veins, C: blood circulates through the body, D: blood ebbs and flows in one space.
https://brainly.com/question/13939040
Valves in the veins support the theory that: A: blood moves in two directions through the vein, B: movement of blood is back and forth through the veins, C: blood circulates through the body, D: blood ebbs and flows in one space
https://www.collegeofphlebology.com/how-veins-work/where-is-it/
How veins work In a normal person, the heart pumps arterial blood that is full of oxygen and nutrients, out into the body, limbs and head through the arterial system. This is best considered when the patient is lying down. Once the blood has travelled through the arteries into the capillaries (which lie in all […]
http://www.altimed.co.uk/help/theory-of-compression/
Theory of Compression The Circulatory System. The first step in understanding compression is to understand the circulatory system (fig 1). Fig 1. The circulatory system includes the heart and blood vessels (arteries, veins and capillaries). The heart acts as a pump, moving blood around the body through the network of blood vessels.
https://www.youtube.com/watch?v=2P3iY-IbpNA
Mar 12, 2016 · Healthy functioning valves are vital to the proper flow of blood in the veins. But what exactly are valves, what do they do and what do they look like. If you have any vein condition such as ...Author: The VeinCare Centre
https://www.phlebolymphology.org/the-venous-valves-of-the-lower-limbs/
In his In Anatomen Corporis Humani Tabulae Quatuor published in 1544, Ludovicus Vassaeus was the first to mention the existence of valves within the veins. 1 Vesalius did not mention the existence of venous valves (VVs) in the first edition of his De Humanis Corporis Fabrica, but included them after Sylvius Ambianus (1478-1555) described the presence of valves in the veins of the lower limbs.
https://answers.yahoo.com/question/index?qid=20090218042806AAmQ8oK
Feb 18, 2009 · The pressure of blood in the veins is much lower than it is in the arteries because that blood has travelled the furthest. Therefore, due to this low pressure - blood isn't being pushed forwards as much as may end up flowing back. Luckily, there are valves in the veins which allow the blood to flow through forwards but not backwards.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2776239/
Sep 21, 2009 · Having perceived that the quantity of blood issuing from the heart in any given time was too much to be absorbed by the tissues, he was able to show that the valves in the veins permit the blood to flow only in the direction of the heart and to prove that the blood circulated around the body and returned to the heart.Cited by: 17
https://quizlet.com/21768548/varicose-veins-flash-cards/
A weakened valve allows backflow of blood to the previous valve in a vein. If the valve can't hold the pooling blood, it becomes incompetent, allowing even more blood to flow backward. As the volume of venous blood builds, pressure in the vein increases and the vein becomes distended.
https://quizlet.com/82905462/ib-biology-62-the-blood-system-flash-cards/
In the event that blood pressure in a vein is so low that backflow can push blood back to capillaries, three cup-shaped flaps of tissue called pocket valves are used. If blood flows back, the flaps catch it and block the lumen of the vein When the blood flows again, the flaps are pushed to the sides the valve opens
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