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Atria

Atria

(Science: anatomy, cardiology) The thin-walled chambers of the heart that pump blood into the ventricles. Consists of right atrium and left atrium.


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How does blood is circulated in amphibians?

The frog circulatory system consist of two atria and one single ventricle. It is the only organ within the coelom which has its own protective covering. The single ventricle is not divided into two compartments like a humans heart, but it is separated ...

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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: 7254

How does blood is circulated in amphibians?

In amphibians like frog,during blood circulation 2 atria contract and pump blood into single ventricle(heart is 3 chamberd).In the ventricle mixed blood is formed.How does mixed blood is circulated to various body parts via aorta?

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by kumar985
Fri Jul 20, 2012 4:29 pm
 
Forum: Physiology
Topic: How does blood is circulated in amphibians?
Replies: 4
Views: 7254

A.V. node

... frankly. I'll be generous and sauce you an answer, it's the pace setter because it Delays the contraction of the ventricles to ensure that the atria have pumped its blood into them. Don't ask a bunch of questions without showing that you atleast have some clue as to what you know

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by Gilby101
Sun Apr 29, 2012 12:04 pm
 
Forum: General Discussion
Topic: A.V. node
Replies: 1
Views: 1407

The Heart

Yes congratulations on 4! I'm afraid I don't really know for 2. Contractions in the atria at a basal level are caused by the SA node (which is part of neither system), but it is affected by parasympathetic from the vagus to slow it down, and sympathetic to speed it ...

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by Babybel56
Sun Apr 24, 2011 8:31 am
 
Forum: Human Biology
Topic: The Heart
Replies: 6
Views: 9757

The Heart

Okay I'll do the 4. questions first because I'm relatively sure I can answer them correctly. The SA node sends a signal via the atrial-ventricular node (AV) down the purkinje fibres in the centre of the heart, causing it to contract from the bottom upwards (so the ventricles can empty ...

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by Babybel56
Sat Apr 23, 2011 8:26 pm
 
Forum: Human Biology
Topic: The Heart
Replies: 6
Views: 9757
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