eustachian valve

noun

often capitalized E
: a crescent-shaped fold of the lining membrane of the heart at the entrance of the inferior vena cava that directs the blood through the foramen ovale to the left atrium in the fetus but is rudimentary and functionless in the adult

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Cite this Entry

“Eustachian valve.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/eustachian%20valve. Accessed 22 Nov. 2024.

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