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Right atrium

right atrium

(Science: anatomy) The thin-walled chamber of the heart which pumps blood into the right ventricle for ejection into the pulmonary circulation.


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How does blood is circulated in amphibians?

... mixed. This is done by the arrangement of the frogs heart, where the right atrium dips downward into the ventricle. Which causes oxygen-poor blood that is entering the ...

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by suzidoc8
Mon Jul 23, 2012 2:00 pm
 
Forum: Physiology
Topic: How does blood is circulated in amphibians?
Replies: 4
Views: 2554

Heart : Difference between tricuspid and bicuspid valves ?

Hi, at a guess, the tricuspid valve (separating the right atrium from the right ventriclel) has three cusps (flaps) simply because the diameter of the right ...

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by Julie5
Sun Oct 24, 2010 10:45 am
 
Forum: Human Biology
Topic: Heart : Difference between tricuspid and bicuspid valves ?
Replies: 3
Views: 16722

Re: Why bronchial circ. dumps deoxygenated blood in2 L. atrium?

Mith, I've explored that option. There are some that believe that it is a remnant of the ductus arteriosus, but animals like opossums never have an ductus arteriosus and have the same setup for venous return...

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by phuturephysician
Sun Feb 01, 2009 8:47 pm
 
Forum: Human Biology
Topic: Why bronchial circ. dumps deoxygenated blood in2 L. atrium?
Replies: 8
Views: 5946

Re: Why bronchial circ. dumps deoxygenated blood in2 L. atrium?

Yes, this is the human heart. Bronchial circulation (feeding the lungs themselves) does indeed dump deoxygenated blood into the left atrium. I know that this is not a significant issue, it just makes me curious. I have found no real answers to explain this.

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by phuturephysician
Fri Jan 30, 2009 6:42 pm
 
Forum: Human Biology
Topic: Why bronchial circ. dumps deoxygenated blood in2 L. atrium?
Replies: 8
Views: 5946

Why bronchial circ. dumps deoxygenated blood in2 L. atrium?

In human heart, oxygenated blood goes into left atrium by vena pulmonalis, but deoxygenated blood comes into R atrium, then goes ... ventricle, but still oxygenated blod goes into left, and deoxygenated into right atrium. Reptiles - only crocodiles have, just like Aves(birds) and Mammalia, ...

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by miloshic
Fri Jan 30, 2009 2:16 pm
 
Forum: Human Biology
Topic: Why bronchial circ. dumps deoxygenated blood in2 L. atrium?
Replies: 8
Views: 5946
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