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  • The Heart: All about Our Circulatory System and More!

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Buy from Amazon $6.99$0.01 $7.50 $5.00 $2.50 Aug Nov Feb May Aug Nov Feb May Aug Nov Feb May 2013 2014 2015 2016 $6.20, May 12 - Aug 8$6.29, Jul 8 - Aug 29$6.18, Sep 19 11:28 am$6.29, Nov 20 - Oct 7$6.29, Nov 20 - Oct 7$1.99, May 3 - May 21$0.01, May 3 4:26 am$6.29, Nov 20 - Oct 7$1.99, May 3 - May 21$1.17, May 4 - May 5$6.29, Nov 20 - Oct 7$1.99, May 3 - May 21$1.60, May 7 - May 14$6.29, Nov 20 - Oct 7$1.99, May 3 - May 21$1.44, May 15 7:36 pm$6.29, Nov 20 - Oct 7$1.99, May 3 - May 21$0.86, May 19 8:45 pm$6.29, Nov 20 - Oct 7$2.00, May 21 - May 22$0.79, May 22 8:24 am$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$0.66, May 25 12:09 am$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$0.47, May 28 4:09 am$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$0.34, May 30 9:02 am$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$0.29, Jun 2 2:37 am$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$0.26, Jun 4 3:12 pm$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$0.18, Jun 6 - Jun 7$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$0.11, Jun 9 - Jun 10$6.29, Nov 20 - Oct 7$3.97, Jun 12 - Jun 18$1.73, May 23 - Aug 22$6.29, Nov 20 - Oct 7$3.17, Jun 18 6:41 pm$1.73, May 23 - Aug 22$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$1.37, Jun 21 7:53 pm$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$1.22, Jun 24 9:53 pm$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$1.10, Jun 27 7:36 am$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$1.04, Jun 28 - Jun 30$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$0.94, Jul 2 6:06 pm$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$0.75, Jul 5 2:34 am$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$0.48, Jul 8 5:41 pm$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$0.24, Jul 11 6:32 am$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$0.07, Jul 14 12:49 am$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$0.01, Jul 15 - Aug 2$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$0.95, Aug 5 4:33 am$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$0.80, Aug 8 8:18 am$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$0.76, Aug 10 9:37 am$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$0.72, Aug 13 4:29 am$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$0.66, Aug 16 1:20 am$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$0.59, Aug 19 7:35 am$6.29, Nov 20 - Oct 7$1.73, May 23 - Aug 22$1.64, Aug 21 10:13 am$6.29, Nov 20 - Oct 7$1.73, Aug 24 - Sep 23$1.05, Aug 24 12:20 pm$6.29, Nov 20 - Oct 7$1.73, Aug 24 - Sep 23$0.61, Aug 27 5:20 pm$6.29, Nov 20 - Oct 7$1.73, Aug 24 - Sep 23$0.53, Aug 29 10:40 pm$6.29, Nov 20 - Oct 7$1.73, Aug 24 - Sep 23$0.43, Sep 1 7:19 am$6.29, Nov 20 - Oct 7$1.73, Aug 24 - Sep 23$0.27, Sep 4 11:53 pm$6.29, Nov 20 - Oct 7$1.73, Aug 24 - Sep 23$0.20, Sep 7 8:59 am$6.29, Nov 20 - Oct 7$1.73, Aug 24 - Sep 23$0.01, Sep 9 - Sep 23$6.29, Nov 20 - Oct 7$2.94, Sep 24 9:09 am$1.72, Sep 24 - Sep 25$6.29, Nov 20 - Oct 7$2.97, Sep 29 - Oct 8$1.73, Sep 25 - Oct 8$5.47, Oct 8 - Oct 13$2.98, Oct 10 - Oct 20$2.68, Oct 9 - Oct 11$5.47, Oct 8 - Oct 13$2.98, Oct 13 1:10 am$2.98, Oct 10 - Oct 20$6.29, Oct 14 - Nov 11$2.98, Oct 10 - Oct 20$1.86, Oct 16 7:02 am$6.29, Oct 14 - Nov 11$2.98, Oct 10 - Oct 20$1.62, Oct 18 1:05 pm$6.29, Oct 14 - Nov 11$2.86, Oct 22 12:11 am$1.29, Oct 22 12:11 am$6.29, Oct 14 - Nov 11$3.47, Oct 24 - Oct 26$1.02, Oct 24 10:46 am$6.29, Oct 14 - Nov 11$3.47, Oct 24 - Oct 26$0.91, Oct 26 6:56 pm$6.29, Oct 14 - Nov 11$3.35, Oct 29 - Nov 1$0.81, Oct 29 6:16 pm$6.29, Oct 14 - Nov 11$3.35, Oct 29 - Nov 1$0.40, Nov 1 10:30 am$6.29, Oct 14 - Nov 11$3.23, Nov 4 5:41 am$0.07, Nov 4 5:41 am$6.29, Oct 14 - Nov 11$2.44, Nov 7 - Dec 8$0.14, Nov 7 7:42 pm$6.29, Oct 14 - Nov 11$2.44, Nov 7 - Dec 8$0.01, Nov 11 - Nov 16$6.35, Nov 14 - Nov 21$2.44, Nov 7 - Dec 8$0.01, Nov 11 - Nov 16$6.35, Nov 14 - Nov 21$2.44, Nov 7 - Dec 8$0.63, Nov 18 7:15 am$6.35, Nov 14 - Nov 21$2.44, Nov 7 - Dec 8$0.94, Nov 19 - Nov 21$6.41, Nov 23 - Dec 1$2.44, Nov 7 - Dec 8$1.01, Nov 24 2:02 am$6.41, Nov 23 - Dec 1$2.44, Nov 7 - Dec 8$0.93, Nov 27 5:21 am$6.41, Nov 23 - Dec 1$2.44, Nov 7 - Dec 8$0.86, Nov 29 4:56 am$6.47, Dec 2 - Dec 12$2.44, Nov 7 - Dec 8$2.43, Dec 2 - Dec 5$6.47, Dec 2 - Dec 12$2.44, Nov 7 - Dec 8$2.40, Dec 8 7:01 am$6.47, Dec 2 - Dec 12$3.51, Dec 10 - Dec 14$2.37, Dec 10 1:18 pm$6.53, Dec 13 - Dec 18$3.51, Dec 10 - Dec 14$0.01, Dec 13 - Jan 27$6.53, Dec 13 - Dec 18$3.50, Dec 15 - Dec 18$0.01, Dec 13 - Jan 27$6.99, Dec 25 - Apr 25$2.95, Dec 26 11:48 pm$0.01, Dec 13 - Jan 27$6.99, Dec 25 - Apr 25$2.84, Dec 28 - Jan 7$0.01, Dec 13 - Jan 27$6.99, Dec 25 - Apr 25$2.89, Jan 7 - Mar 18$0.01, Dec 13 - Jan 27$6.99, Dec 25 - Apr 25$2.89, Jan 7 - Mar 18$0.04, Jan 29 4:40 pm$6.99, Dec 25 - Apr 25$2.89, Jan 7 - Mar 18$0.01, Feb 1 - Feb 2$6.99, Dec 25 - Apr 25$2.89, Jan 7 - Mar 18$2.61, Feb 4 6:45 am$6.99, Dec 25 - Apr 25$2.89, Jan 7 - Mar 18$2.48, Feb 7 12:28 am$6.99, Dec 25 - Apr 25$2.89, Jan 7 - Mar 18$2.31, Feb 9 7:39 pm$6.99, Dec 25 - Apr 25$2.89, Jan 7 - Mar 18$2.11, Feb 12 2:40 pm$6.99, Dec 25 - Apr 25$2.89, Jan 7 - Mar 18$1.94, Feb 15 10:14 am$6.99, Dec 25 - Apr 25$2.89, Jan 7 - Mar 18$1.81, Feb 18 9:26 am$6.99, Dec 25 - Apr 25$3.19, Feb 20 8:17 am$2.89, Jan 7 - Mar 18$6.99, Dec 25 - Apr 25$2.89, Feb 22 - Feb 27$2.89, Jan 7 - Mar 18$6.99, Dec 25 - Apr 25$2.89, Jan 7 - Mar 18$2.70, Mar 1 4:13 am$6.99, Dec 25 - Apr 25$2.89, Jan 7 - Mar 18$2.69, Mar 3 7:19 pm$6.99, Dec 25 - Apr 25$2.89, Jan 7 - Mar 18$2.62, Mar 6 10:10 pm$6.99, Dec 25 - Apr 25$2.89, Jan 7 - Mar 18$2.60, Mar 7 11:09 pm$6.99, Dec 25 - Apr 25$2.89, Jan 7 - Mar 18$2.51, Mar 12 12:13 pm$6.99, Dec 25 - Apr 25$2.89, Jan 7 - Mar 18$0.01, Mar 14 - Mar 16$6.99, Dec 25 - Apr 25$2.89, Jan 7 - Mar 18$0.32, Mar 17 6:26 pm$6.99, Dec 25 - Apr 25$2.67, Mar 20 - Mar 21$0.50, Mar 20 1:56 am$6.99, Dec 25 - Apr 25$2.89, Mar 23 - Apr 25$1.18, Mar 23 1:37 pm$6.99, Dec 25 - Apr 25$2.89, Mar 23 - Apr 25$1.28, Mar 25 9:30 pm$6.99, Dec 25 - Apr 25$2.89, Mar 23 - Apr 25$1.13, Mar 29 10:09 am$6.99, Dec 25 - Apr 25$2.89, Mar 23 - Apr 25$1.01, Mar 31 8:06 pm$6.99, Dec 25 - Apr 25$2.89, Mar 23 - Apr 25$0.95, Apr 3 11:49 am$6.99, Dec 25 - Apr 25$2.89, Mar 23 - Apr 25$0.87, Apr 6 4:03 am$6.99, Dec 25 - Apr 25$2.89, Mar 23 - Apr 25$0.80, Apr 8 10:03 pm$6.99, Dec 25 - Apr 25$2.89, Mar 23 - Apr 25$0.74, Apr 11 6:35 pm$6.99, Dec 25 - Apr 25$2.89, Mar 23 - Apr 25$0.68, Apr 14 2:05 pm$6.99, Dec 25 - Apr 25$2.89, Mar 23 - Apr 25$0.54, Apr 17 8:58 am$6.99, Dec 25 - Apr 25$2.89, Mar 23 - Apr 25$0.01, Apr 20 - Apr 25$6.99, Apr 27 - May 18$2.89, Apr 27 - May 22$0.84, Apr 27 - Apr 28$6.99, Apr 27 - May 18$2.89, Apr 27 - May 22$0.39, May 1 - May 4$6.99, Apr 27 - May 18$2.89, Apr 27 - May 22$0.34, May 5 7:56 pm$6.99, Apr 27 - May 18$2.89, Apr 27 - May 22$0.44, May 9 9:32 am$6.99, Apr 27 - May 18$2.89, Apr 27 - May 22$0.75, May 11 7:54 am$6.99, Apr 27 - May 18$2.89, Apr 27 - May 22$0.69, May 14 2:53 pm$6.99, Apr 27 - May 18$2.89, Apr 27 - May 22$0.73, May 18 10:34 amOOS $6.99, May 20 - May 24$2.89, Apr 27 - May 22$0.84, May 20 3:26 pmOOS $6.99, May 20 - May 24$2.89, Apr 27 - May 22$0.75, May 22 6:55 pmOOS $6.99, May 20 - May 24$3.27, May 24 9:09 pm$0.69, May 24 9:09 pm$6.99, May 27 - May 29$2.73, May 27 - May 29$0.56, May 29 8:05 amOOS $6.99, Jun 2 - Jun 9$2.82, Jun 2 - Jul 1$0.17, Jun 2 11:28 pmOOS $6.99, Jun 2 - Jun 9$2.82, Jun 2 - Jul 1$0.01, Jun 5 - Jul 3$6.99, Jun 11 - Mar 31$2.82, Jun 2 - Jul 1$0.01, Jun 5 - Jul 3$6.99, Jun 11 - Mar 31$2.84, Jul 3 - Jul 5$0.01, Jun 5 - Jul 3$6.99, Jun 11 - Mar 31$2.84, Jul 3 - Jul 5$0.07, Jul 5 7:00 pm$6.99, Jun 11 - Mar 31$2.88, Aug 1 - Aug 7$0.01, Aug 1 - Aug 26$6.99, Jun 11 - Mar 31$2.89, Aug 9 - Nov 14$0.01, Aug 1 - Aug 26$6.99, Jun 11 - Mar 31$2.89, Aug 9 - Nov 14$0.02, Aug 28 - Aug 30$6.99, Jun 11 - Mar 31$2.89, Aug 9 - Nov 14$0.01, Sep 1 - Mar 13$6.99, Jun 11 - Mar 31$2.88, Nov 16 8:02 pm$0.01, Sep 1 - Mar 13$6.99, Jun 11 - Mar 31$2.89, Nov 19 - Mar 19$0.01, Sep 1 - Mar 13$6.99, Jun 11 - Mar 31$2.89, Nov 19 - Mar 19$0.30, Mar 19 8:03 am$6.99, Jun 11 - Mar 31$2.78, Mar 25 - Mar 31$0.01, Mar 25 - Mar 31 24,348409,394 468,750 375,000 281,250 187,500 93,750 Oct Dec Feb Apr Jun Aug Oct Dec Feb Apr 2015 2016

Price Details

New

Latest $6.99 11 hrs ago
Highest $6.99 Jun 11, '15
Lowest $5.47 Oct 8, '14
Average $6.99 (30d avg)
$6.99 (90d avg)
$6.99 (180d avg)
$6.99 (365d avg)
$6.59 (Lifetime average)
Added May 11, 2013

3rd Party New

Latest $2.78 11 hrs ago
Highest $3.72 Aug 23, '14
Lowest $1.73 Sep 25, '14
Average $2.87 (30d avg)
$2.88 (90d avg)
$2.89 (180d avg)
$2.88 (365d avg)
$2.64 (Lifetime average)
Added May 11, 2013

3rd Party Used

Latest $0.01 11 hrs ago
Highest $3.97 Jun 12, '14
Lowest $0.01 Mar 25, '16
Average $0.07 (30d avg)
$0.03 (90d avg)
$0.02 (180d avg)
$0.12 (365d avg)
$0.56 (Lifetime average)
Added May 11, 2013

Sales Rank

30 day average: 133,520
90 day average: 124,798

Product Description

By the time you finish reading these words, your heart may have beaten up to 50 times. As you walk, eat, and sleep, your heart continually pumps trillions of blood cells through thousands of miles of blood vessels inside your body. You may not be able to see your own heart, but all you have to do is look inside this book to see how this amazing organ works. Acclaimed science writer Seymour Simon brings you this indispensable guide that takes you through the heart, from atrium to capillary and back again.

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