https://www.youtube.com/watch?v=eOwPDNnE3-0&t=11s
The one-way valves present in the veins help blood move upward against the force of gravity. These one-way valves prevent the blood from flowing backwards during the brief moment between heartbeats. Failure of these valves causes the blood to flow downwards and pool in the veins of the leg, thus, causing...
In the human body, there are two types of blood vessels, the arteries and the veins and each has a very simple, yet important job to do. The arteries are the blood vessels which start from the heart and distribute freshly oxygenated blood to the body. Furthermore, for most part of the body, the arteries take the...
