18 Feb 2016 | 258,249 Views. You may not even associate this with your health, yet it can make a life or death difference. Ignore or defy it, and your risk of death before your 65th birthday jumps 25 percent. Here's the big takeaway message to tell your body for health and longevity.
1 Veins have valves which maintain the unidirectional flow of blood, even against gravity. 2  Since the venous pressure is low (7 mm Hg) the valves are of utmost value in the venous return. However, the valves are absent in: 3  The veins of less than 2 mm diameter.  The venae cavae.
The heart has two main valves..the one on the right is called the tricuspid valve and the one on the left side of the heart is called the mitral valve. The valves are located â¦ between the atria and the ventricles. There are four chambers in the human heart...a right and a left atrium and a right and a left ventricle.The heart is made of filling stations = the atria and pumping stations = the ventricles. The valves prevent blood from moving between the atria and ventricles during the pumping and filling processes.he valves are located â¦ between the atria and the ventricles. There are four chambers in the human heart...a right and a left atrium and a right and a left ventricle. The heart is made of filling stations = the atria and pumping stations = the ventricles.