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Topic: Atrium (anatomy)

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	HighBeam Encyclopedia - Chordata (Site not responding. Last check: 2007-11-05)
		A groove in the pharynx called the endostyle secretes mucus that traps the particles and conveys them into the digestive tract; the movement of the mucus is caused by the action of cilia.
		Thus the gill slits in tunicates serve a feeding function, not a respiratory function.
		The primates, the group that includes humans, are fairly close to the original mammalian type in general structure (for example, they have five fingers and toes and walk flat on the sole of the foot), but they have undergone great evolutionary advances in the development of the brain, vision, and manual dexterity.
	www.encyclopedia.com /html/C/Chordata.asp (3443 words)

	Heart Disease
		The mitral valve, between the left atrium and the left ventricle.
		The aortic valve, between the left ventricle and the aorta, the main artery from the heart to the rest of the body.
		Oxygenated blood, a brighter red in color than before, flows back to the heart, entering the left atrium, then moving into the left ventricle, and finally pushing through the aorta into the network of arteries that branches out through the body.
	www.healthsquare.com /heartdisease.htm (1591 words)

	Heart Info - Heart FAQ (Site not responding. Last check: 2007-11-05)
		The left ventricle is the main pumping chamber of the heart since it is responsible for pushing blood through the rest of the circulatory system.
		Between the left ventricle and the left atrium lies the mitral valve.
		This causes mitral regurgitation (as in blood regurgitating back into the left atrium from the left ventricle), which if severe enough can cause over a period of years or decades progressive left atrial dilation and heart failure (thus, the reason for periodic follow up physician visits among individuals with MVP).
	www.heartinfo.com /ms/nav/faq/main.html (6001 words)

	biology - Atrium (anatomy)
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		In fish, the circulatory system is very simple: a two-chambered heart including one atrium and one ventricle.
		In vertebrate groups that evolved later, the circulatory system is much more complicated.
	www.biologydaily.com /biology/Atrium_(anatomy) (159 words)

	Atrium (anatomy) - GetQuick.info (Site not responding. Last check: 2007-11-05)
		Read about atrium (anatomy) in the free online encyclopedia and dictionary.
		In anatomy, the atrium is the blood collection chamber of a heart.
		Get more information on atrium (anatomy) at one of the best sites on the Internet.
	getquick.info /Atrium_(anatomy).html (350 words)

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