div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=biol-121-chp-20-part-1-heart-lecture-review-keyhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: BIOL 121 Chp 20 Part 1 Heart Lecture Review Key loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader033vdocumentsnetreader033viewer202205250755845cfed8b42a7a1d8b4a60html5thumbnails1jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=2Page 2button div class=ts-imageimg data-url=biol-121-chp-20-part-1-heart-lecture-review-keyhtmlpage=2 data-page=2 class=ts-thumb lazyload alt=Page 2: BIOL 121 Chp 20 Part 1 Heart Lecture Review Key loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader033vdocumentsnetreader033viewer202205250755845cfed8b42a7a1d8b4a60html5thumbnails2jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=3Page 3button div class=ts-imageimg data-url=biol-121-chp-20-part-1-heart-lecture-review-keyhtmlpage=3 data-page=3 class=ts-thumb lazyload alt=Page 3: BIOL 121 Chp 20 Part 1 Heart Lecture Review Key loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader033vdocumentsnetreader033viewer202205250755845cfed8b42a7a1d8b4a60html5thumbnails3jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=4Page 4button div class=ts-imageimg data-url=biol-121-chp-20-part-1-heart-lecture-review-keyhtmlpage=4 data-page=4 class=ts-thumb lazyload alt=Page 4: BIOL 121 Chp 20 Part 1 Heart Lecture Review Key loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader033vdocumentsnetreader033viewer202205250755845cfed8b42a7a1d8b4a60html5thumbnails4jpg width=140 height=200 divdiv