Arteries
What is the other name for the Tunica Externa?
Tunica Adventitia
Do veins have valves?
yes!
Do veins or arteries have a larger lumen?
veins
What is responsible for regulating the diameter of the lumina?
smooth muscle cells
Which layer of the vein is non-thrombogenic?
Tunica Intima, endothelium
Why do veins have thinner and weaker walls?
There is low venous pressure
What ensures that the outer walls of the Tunica Externa receive nourishment?
Vasa Vasorum
Do veins carry oxygenated or de-oxygenated blood?
both!
How much %blood is in veins?
How much %blood is in arteries?
60% Veins/venules
15% Arteries/arterioles
What is the pathway of blood flow away from the heart?
Heart --> arteries --> arterioles --> capillaries
What is the pathway of blood flow towards the heart
capillaries --> venules --> veins --> heart
What 2 pumps aid in venous blood return?
skeletal muscle pump and the respiratory pump