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Fetal circulation involves highly oxygenated blood from the placenta reaching the fetal liver via the left umbilical vein, while deoxygenated blood returns through the umbilical arteries. Blood flows from the right atrium to the left atrium through the foramen ovale, then to the left ventricle and aorta, with a small portion going to the lungs. At birth, the cessation of placental blood flow and lung expansion lead to the closure of key structures, altering the circulation system.
- Author
- bobdube86
- Language
- EN