Arteries, Veins & Capillaries
Blood is transported from and to the heart in three distinct types of blood vessels with specialized structures.
Most students confuse the function of valves.
What is Arteries, Veins & Capillaries?
"Blood vessels, including arteries, veins, and capillaries, are tubular structures that carry blood through the tissues and organs."
Which blood vessel carries blood away from the heart?
Why do arteries have thick, elastic walls?
Why do veins have valves?
Why are capillaries suitable for exchanging substances with cells?
Three Vessel Types
Arteries: Thick, elastic walls to handle high pressure. Veins: Walls with valves to prevent backflow.
Capillaries: Only one cell thick to allow rapid diffusion of gases and nutrients.
Veins always carry blood TOWARDS the heart, while arteries carry blood AWAY from it.
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