Struggling to understand heart and foraman ovale question Watch

Stormragexox
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Hey guys, I am struggling to understand this question
The blood circulatory system of a mammal undergoes changes at, or soon after, birth.
(i) One of these changes is that the foramen ovale, a hole in the septum between the right
and left atria, closes. In the fetus, the foramen ovale allows blood to flow directly from the
right atrium to the left atrium.
Suggest why the foramen ovale is open in the fetus before birth.
Last edited by Stormragexox; 2 months ago
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the bear
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(Original post by Stormragexox)
Hey guys, I am struggling to understand this question
The blood circulatory system of a mammal undergoes changes at, or soon after, birth.
(i) One of these changes is that the foramen ovale, a hole in the septum between the right
and left atria, closes. In the fetus, the foramen ovale allows blood to flow directly from the
right atrium to the left atrium.
Suggest why the foramen ovale is open in the fetus before birth.
the lungs are not functioning in the unborn child so do not need their separate blood supply etc.
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ZombieTheWolf
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(Original post by Stormragexox)
Hey guys, I am struggling to understand this question
The blood circulatory system of a mammal undergoes changes at, or soon after, birth.
(i) One of these changes is that the foramen ovale, a hole in the septum between the right
and left atria, closes. In the fetus, the foramen ovale allows blood to flow directly from the
right atrium to the left atrium.
Suggest why the foramen ovale is open in the fetus before birth.
Because the fetus does not use its lungs to oxygenate deoxygentated blood.The mother's heart does this for the baby.If it flows the right atrium to the left, the oxygenated blood can flow to all of its body.
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Last edited by ZombieTheWolf; 2 months ago
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Stormragexox
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(Original post by ZombieTheWolf)
Because the fetus does not use its lungs to oxygenate deoxygentated blood.The mother's heart does this for the baby.If it flows the right atrium to the left, the oxygenated blood can flow to all of its body.
(Original post by the bear)
the lungs are not functioning in the unborn child so do not need their separate blood supply etc.
Thank you I understand it now XD
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