نحوه کار قلب

http://s1.picofile.com/file/8227070626/%D9%86%D8%AD%D9%88%D9%87_%DA%A9%D8%A7%D8%B1_%D9%82%D9%84%D8%A8_2_.mp4.html

و

http://s3.picofile.com/file/8227071242/%D9%86%D8%AD%D9%88%D9%87_%DA%A9%D8%A7%D8%B1_%D9%82%D9%84%D8%A8.mp4.html