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Heart valves

Heart valves

flaps of tissue that prevent regurgitation of blood from the ventricles to the atria or from the pulmonary arteries or aorta to the ventricles.


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can someone please explain

... what i would hear . So far i'm up . to Listen for the rythem of the heart beat. A normal heartbeat makes a lub-dup sound. This sound is created when the heart tissue vibrates , it is pushed against the heart valves and bounces back. In the case of stress, stress can raise heartbeat ...

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by monkeyfromsainsburys
Fri Jul 18, 2008 8:56 pm
 
Forum: Human Biology
Topic: can someone please explain
Replies: 1
Views: 773

Important test?

... in the absence of complement, it also impedes colonization of damaged heart valves, perhaps by masking adhesins. http://www.textbookofbacteriology.net/staph.html

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by MichaelXY
Wed May 07, 2008 11:48 pm
 
Forum: Microbiology
Topic: Important test?
Replies: 1
Views: 1082

More Questions on Circulatory System

... the circulatory system. Thanks in advance! --- 1. In general, one-way valves are found in lymph vessels, veins, and the heart muscle. There wouldn't be any in the artery because blood is continually flowing away ...

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by vertciel
Sun Feb 24, 2008 10:16 pm
 
Forum: Human Biology
Topic: More Questions on Circulatory System
Replies: 3
Views: 2573

Heart Damage Caused by viral infection

... which of course is a bacterium, not virus. Unless I am mistaken, heart attack can be caused by 'molecular minicry', where the antibodies produced to attack the S. aureus infection also attack the heart valves. Is this similar?

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by Googled
Thu Apr 05, 2007 10:27 am
 
Forum: Human Biology
Topic: Heart Damage Caused by viral infection
Replies: 9
Views: 5287

Heart

Good question. Why doesn't the heart have only ventricles? Well, your answer is correct. the ventricles contract for ... in the atria and keep it there. when the ventricles relax, the atrio-ventricular valves open and the blood flows according to gravity. the atria also contract, but ...

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by MrMistery
Thu Jan 11, 2007 8:58 pm
 
Forum: Human Biology
Topic: Heart
Replies: 16
Views: 2224
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