The valves help to prevent blood from seeping backwards. They provide a one way valve. When valves begin to fail blood may become stagnant and cause unsightly varicose veins - usually in the legs..

They both empty into the right atrium

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As of my last update in September 2021, the average cost of a single Tixel Laser session ranged from $200 to $800 or more. However, prices can change over time, so it's essential to consult with a qualified dermatologist or clinic for the most up-to-date pricing information in your area.

No.

(Not counting the pulmonary veins)

the least "deoxygenated" blood is in the renal veins and the jugular.

(Neither the brain nor the kidneys use up all the oxygen in their blood supply.)

Blood flow to the skin is sometimes controlled by temperature - heat to be lost - and MAY be less desaturated.

The right atrium

The vena cava is the biggest artery in the body that is attached to the heart, so i would say the cardiovascular system.

the inferior vena cava caries de-oxygenated blood.

The superior vena cava is a large vein in the heart. It carries deoxygenated blood from the body to the right atrium of the heart.

It the blood that goes to the heart

The inferior vena cava (or IVC) is the large vein that carries de-oxygenated blood from the lower half of the body into the right atrium of the heart. Other veins entering the atrium are the superior vena cava and the coronary sinus (vein from the heart muscle).

• If you gather all the veins and arteries together in your body, then it could wrap around the earth, twice!
• There are some veins and arteries that are smaller than a price of your hair!

There are 4 connecting arteries and veins in a frog

In the large veins.

Because in the large veins the blood must fight the gravity, the blood is flowing up, there are valves in them to prevent the blood to fall down again.

bevel

Ulnar and Radial

veins are blue in colour because they carry deoxygenated blood , which carries carbon dioxide with the help of carbamino acid

hemorrhoids

The capillarys are in the lungs and blood flows trough them.As far as I know, blood does not flow back through the capillarys so it most likely does not flow back through the capillary beds.

its may be due to right heart failure,which causes edema of the extermities and it may be due to emboli in your right arm vein which got swollen and causing pain,it may be due to hypertension which cause vericose vein,you should have ECG for heart and APPT and D-DIMER test for emboli.so go to hospital and see doctor

To transport de-oxygenated blood to the lungs.

No.

The circulatory system consists of the veins and arteries. They are the way food and oxygen are transported around the body. They take food and oxygen to muscles and organs

The aorta is the largest artery in the body. An artery transports blood away from the heart, whereas a vein transports blood toward the heart. The aorta begins at the left ventricle of the heart, and nearly all the blood pumped by the heart passes through it. The aorta is about as thick as a garden hose. The aorta loops over the heart before moving downward through the trunk of the body, in a "candy cane" shape. Many other arteries branch off from the aorta to supply blood to all the parts of the body.

Capillaries are the smallest of the blood vessels. Their thin walls and small size facilitate gas exchange with the body tissues.

The hepatic portal vein is created by the anastamoses between the superior mesenteric vein and spleinc vein. It is arguable that the inferior mesenteric vein joins at this same anastomoses but generally it actually joins the splenic vein which then meats the sup. mesenteric vein as stated above. The veins that drain into the portal vein (ie above the ansastmoses between the splenic and sup. mesenteric) are the cystic vein, the right gastric vein and the posterior-superior part of the pancreaticoduodenal vein.