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Flashcards in Foetal Circulation Deck (4)
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Ductus Venosus

Bypass from liver straight to vena cava.


Ductus Arteriosus

Bypass that allows blood from the pulmonary artery to enter directly into the aorta.


Foramen Ovale

Allows blood from RA to go to LA.


Changes after birth

- Foramen ovale closes due to increased pressure, fuses closed.
- Blood no longer flows through the umbilical cord and ductus venosus.
- Rapid RBC increase.
- Not in use > constricts > permanently closed off and cells are destroyed.
- All blood now flows through liver.