sinus venosus
noun
si·nus ve·no·sus
ˈsī-nəs-vi-ˈnō-səs 
: an enlarged pouch that adjoins the heart, is formed by the union of the large systemic veins, and is the passage through which venous blood enters the heart in lower vertebrates and in embryos of higher forms
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“Sinus venosus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sinus%20venosus. Accessed 1 Dec. 2024.
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sinus venosus
noun
si·nus ve·no·sus
ˌsī-nəs-vi-ˈnō-səs
: an enlarged pouch that adjoins the heart, is formed by the union of the large systemic veins, and is the passage through which venous blood enters the heart in lower vertebrates and in embryos of higher forms
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