Re: structure of the heart
- From: "steph" <stephtonge21@xxxxxxxxxxxxx>
- Date: 28 Apr 2006 02:57:43 -0700
Pericardium fluid is present between both layers of the pericardium
membrane. it provides lubrication which therefor prevents friction.
.
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- structure of the heart
- From: tasha
- structure of the heart
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