div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imagea href=https:reader039fdocumentsnetreader039viewer20220220105b0243737f8b9a54578f710fhtml5page1jpg target=_blank img data-url=documentforms-the-valve-flaps-is-called-the-8-the-outermost-layer-of-the-heart-is-calledhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: forms the valve flaps is called the 8 The outermost layer of the heart is called the 9 The fluid that fills the pericardial sac acts to decrease 10 during heart activity loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader039fdocumentsnetreader039viewer20220220105b0243737f8b9a54578f710fhtml5thumbnails1jpg width=140 height=200 adivdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imagea href=https:reader039fdocumentsnetreader039viewer20220220105b0243737f8b9a54578f710fhtml5page2jpg target=_blank img data-url=documentforms-the-valve-flaps-is-called-the-8-the-outermost-layer-of-the-heart-is-calledhtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: forms the valve flaps is called the 8 The outermost layer of the heart is called the 9 The fluid that fills the pericardial sac acts to decrease 10 during heart activity loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader039fdocumentsnetreader039viewer20220220105b0243737f8b9a54578f710fhtml5thumbnails2jpg width=140 height=200 adivdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imagea href=https:reader039fdocumentsnetreader039viewer20220220105b0243737f8b9a54578f710fhtml5page3jpg target=_blank img data-url=documentforms-the-valve-flaps-is-called-the-8-the-outermost-layer-of-the-heart-is-calledhtmlpage=3 data-page=3 class=trans-thumb lazyload alt=Page 3: forms the valve flaps is called the 8 The...