Blood Vessels

Question	Answer
What are the 5 types of blood vessels?	Arteries Arterioles Capillaries Venules Veins
What is the structure of arteries?	Elastic tissue stretches and recoils to maintain the high pressure The endothelium is folded to allow the artery to expand Image: Image (binary/octet-stream)
What is the function of arteries?	Arteries carry blood from the heart to the rest of the body
What is the structure of arterioles?	Arteries branch into arterioles, which are smaller than arteries They have smooth muscle, but less elastic tissue The smooth muscle allows them to expand/contract, controlling the amount of blood flowing
What is the structure of capillaries?	Arterioles branch into capillaries They are one cell thick Image: Image (binary/octet-stream)
What is the function of capillaries?	Substances like C₆H₁₂O₆ and O₂ are exchanged between cells and capillaries
What is the structure of venules?	Capillaries connect to venules, which have very thin walls that contain some muscle cells They join to form veins
What is the structure of veins?	They have a wider lumen and contain valves to prevent backflow They have little elastic or muscle tissue Image: Image (binary/octet-stream)
What is the function of veins?	Veins take blood back under low pressure Blood flow is helped by contraction of nearby body muscles

Resource summary

	Created by Yinka F almost 7 years ago