page_title: Foramen ovale (heart)
hierarchical_section_title: Foramen ovale (heart)
context_page_description: In the fetal heart, the foramen ovale, also foramen Botalli, or the ostium secundum of Born, allows blood to enter the left atrium from the right atrium. It is one of two fetal cardiac shunts, the other being the ductus arteriosus. Another similar adaptation in the fetus is the ductus venosus. In most individuals, the foramen ovale closes at birth. It later forms the fossa ovalis.
context_section_description: In the fetal heart, the foramen ovale (/fəˈreɪmən oʊˈvæli, -mɛn-, -ˈvɑː-, -ˈveɪ-/), also foramen Botalli, or the ostium secundum of Born, allows blood to enter the left atrium from the right atrium. It is one of two fetal cardiac shunts, the other being the ductus arteriosus (which allows blood that still escapes to the right ventricle to bypass the pulmonary circulation). Another similar adaptation in the fetus is the ductus venosus. In most individuals, the foramen ovale closes at birth. It later forms the fossa ovalis.
caption: Heart of human embryo of about thirty-five days, opened on left side.
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