div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imagea href=https:reader039vdocumentinreader039viewer20220220105b0243737f8b9a54578f710fhtml5page1jpg target=_blank img data-url=forms-the-valve-flaps-is-called-the-8-the-outermost-layer-of-the-heart-is-calledhtmlpage=1 data-page=1 class=ts-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:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader039vdocumentinreader039viewer20220220105b0243737f8b9a54578f710fhtml5thumbnails1jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=2Page 2button div class=ts-imagea href=https:reader039vdocumentinreader039viewer20220220105b0243737f8b9a54578f710fhtml5page2jpg target=_blank img data-url=forms-the-valve-flaps-is-called-the-8-the-outermost-layer-of-the-heart-is-calledhtmlpage=2 data-page=2 class=ts-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:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader039vdocumentinreader039viewer20220220105b0243737f8b9a54578f710fhtml5thumbnails2jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=3Page 3button div class=ts-imagea href=https:reader039vdocumentinreader039viewer20220220105b0243737f8b9a54578f710fhtml5page3jpg target=_blank img data-url=forms-the-valve-flaps-is-called-the-8-the-outermost-layer-of-the-heart-is-calledhtmlpage=3 data-page=3 class=ts-thumb lazyload alt=Page 3: 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:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader039vdocumentinreader039viewer20220220105b0243737f8b9a54578f710fhtml5thumbnails3jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=4Page 4button div class=ts-imagea href=https:reader039vdocumentinreader039viewer20220220105b0243737f8b9a54578f710fhtml5page4jpg target=_blank img data-url=forms-the-valve-flaps-is-called-the-8-the-outermost-layer-of-the-heart-is-calledhtmlpage=4 data-page=4 class=ts-thumb lazyload alt=Page 4: 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:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader039vdocumentinreader039viewer20220220105b0243737f8b9a54578f710fhtml5thumbnails4jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=5Page 5button div class=ts-imagea href=https:reader039vdocumentinreader039viewer20220220105b0243737f8b9a54578f710fhtml5page5jpg target=_blank img data-url=forms-the-valve-flaps-is-called-the-8-the-outermost-layer-of-the-heart-is-calledhtmlpage=5 data-page=5 class=ts-thumb lazyload alt=Page 5: 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:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader039vdocumentinreader039viewer20220220105b0243737f8b9a54578f710fhtml5thumbnails5jpg 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called the 9 The fluid that fills the pericardial sac acts to decrease 10 during heart activity loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader039vdocumentinreader039viewer20220220105b0243737f8b9a54578f710fhtml5thumbnails8jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=9Page 9button div class=ts-imagea href=https:reader039vdocumentinreader039viewer20220220105b0243737f8b9a54578f710fhtml5page9jpg target=_blank img data-url=forms-the-valve-flaps-is-called-the-8-the-outermost-layer-of-the-heart-is-calledhtmlpage=9 data-page=9 class=ts-thumb lazyload alt=Page 9: 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 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