Cardiovascular system - Vascular system Flashcards
What is the order of veins from largest to smallest?
Large vein
Medium sized vein
Venule
Fenestrated capillary
What is the order of arteries from largest to smallest?
Elastic artery
Muscular artery
Arteriole
Continuous capillary
What are the outer layer of veins and arteries called?
Tunica externa
What are the middle layers of veins and arteries called?
Tunica media
What are the internal layers of veins and arteries called?
Tunica intima
What is the thin membrane that lines the inside of veins and arteries?
Endothelium
What are the layers of a venule?
Tunica externa, endothelium
What are the layers of a arteriole?
Smooth muscle (tunica media), basement membrane then endothelium
What are the layers of capillary’s?
composed of endothelial cells
How do the valves in vessels work?
(add image) The flow of blood pushes through them to close them, although in the other directions they are blocked. Similar to one way ramps at car parks