noun
a connective tissue covering or investing an organ, vessel, or other structure
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The adventitia is the outermost layer of a blood vessel, providing support and protection.
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I learned in biology class that the adventitia is like the 'skin' of a blood vessel.
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I never realized how important the adventitia is, it's like the 'bodyguard' of blood vessels.
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In life, we all need an adventitia - something or someone to protect and support us from the outside world.