| 词汇 | foramen-ovale |
| 释义 | foramen ovale noun[ S ] anatomy specializeduk /fəˌreɪ.men əʊˈvæl.i/ us /fəˌreɪ.mən oʊˈvæl.i/ a small opening in the heart of a fetus(= a baby before it is born) that allows blood to move directly to the heart without going through the lungs and that closes after the baby is born: For those fetuses with a restrictive foramen ovale, delivery was scheduled in the cardiac unit. After birth, the foramen ovale closes, and the ductus arteriosus becomes obliterated. The defect, called a patent foramen ovale, is a hole between the two upper chambers of the heart. Cardiorespiratory adaptation at birth results in an increase in pulmonary blood flow and closure of the fetal shunts which allow the blood to bypass the lungs; the foramen ovale and ductus arteriosus. Substances & structures in the body abductor accessorius ACL actin adductor funiculus fusiform glomerular glomerulus GnRH navicular neuroendocrine neurohormonal neurohormone nociceptive tendinous tendinum tendo tensor Th See alsoductus arteriosus |
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