Veins

You have a stroke and die!!!!

The veins under the tongue often look really dark in color. The reason for this is because the skin under the tongue is very thin.

elastic tissue

15 million leaves are on the Betul Lenta

Stress because you tighten up. Make a fist right now and you will see your veins tighten. that's because you are stretching the vein and it applies pressure to the below muscle making it visible.

anal

Yes. If a valve fails, the blood may pool up and enlarge the vessels into varicose veins . . . usually in the legs.

small cardiac vein

blood in pulmonary vein is oxygenated and is carried from lungs to heart(and yet is named pulmonary VEIN).Vena cava is the broadest vein,it is associated to the heart. It receives deoxygenated blood from the veins coming to heart from different body parts and gives it to heart for pumping.

I hope it clears your doubt.

semi-lunar valves which consist of two leaflets

Source: Holes's Human A&P, 12th ed., p 579

The purpose of portal vein bypass surgery is to lower portal hypertension.internal bleeding caused by portal hypertension occurs in about 40% of patients with cirrhosis.Portal vein bypass.is performed on these surviving patients to control bleeding.

Veins are blue because the blood is poor in oxygen, arteries are red because the blood is rich in oxygen.

Dear Reader; There are so many possibilities that I could miss it altogether or say something that would cause you undo concern. This is a matter that you may take up with your health care provider. Your concern could be answered in a phone conversation if it lies within a small group of possibilities. Dwight

Well, pulmonary means lung so consider it the lung circuit so it's mostly to the heart and then to the lung and repeat. Arteries in the pulmonary circuit will carry non oxygenated blood to the lungs and it will go to several stages before the remaining blood goes into the veins which will seperate into smaller vessels which will always connect back to the heart where it enters the atrium so the remaining blood goes again through many stages then repeats.

The two major veins which drain the leg are 1) the femoral vein, and 2) the saphenous vein.

The pulmonary artery carries deoxygenated blood from the heart to the lungs.

Right and left brachiocephalic veins

Venous insufficiency is a condition in which blood pools in the vein because the valves have become incompetent.

well.....you would bleed. depending on the severity of the cut and the size of the vein, you could die without medical attention. Do not, under any circumstances, purposefully cut your hand. You do not know what is in there. If you want to cut your hand, seek medical attention before you do so. They will get you the help you need.

The superficial veins of the upper extremities are best for cannulation.

Veins carry deoxygenated blood to the heart. To do this they have multiple structural features.

The first feature is the wide lumen. This is because it takes blood back to the heart so a high pressure is not required. It also allows ease of flow.

The second feature is the endothelium that surround the lumen. The endothelium is known as a lining and is a single layer of cells. This reduces friction of the flowing blood.

The third feature of the vein is that it has valves. Valves are very useful as it keeps blood flowing towards the heart and prevents backflow.

The forth feature of the vein is that it has smooth muscle.Smooth muscle can constrict to improve exchange of gas at the alveoli.

The fifth feature of the vein is that it has elastic tissuewhich works as the smooth muscles relaxes to return the vessel to it's orignal size and shape.

Lastly as the previous answer stated: the walls of the vein are thin as there is little muscle.

A woman's total blood volume increases during pregnancy, which increases the blood pressure in the venous system. In addition, the hormonal changes of pregnancy cause the walls and valves in the veins to soften.

VALVES