9 3 Hearts Complex hearts have evolved multiple times beginning with just blood vessels that contract in pulses and outpocketings of vessels that contract in waves peristalsis Before we get into the diversity of heart anatomy and function we need a refresher on anatomical directions To prepare for class read this review paper https utexas instructure com courses 1099761 files 35134879 download verifier b1lmA7fvmJWxrnLEcW8uvFZxiAfU5kfMVAPXMWze wrap 1 https utexas instructure com courses 1099761 files 35134879 download verifier b1lmA7fvmJWxrnLEcW8uvFZxiAfU5kfMVAPXMWze wrap 1 by Bettex et al from June of this year Is our heart a well designed pump The heart along animal evolution This article was written by Swiss cardiologists for a European medical journal While it is informative for our purposes what does the heart look like in different animals how does it work how have these changes co evolved with others its presentation of evolution is misleading Keep in mind what you know about evolution it is the result of random mutation and multiple forces that affect allele frequency natural selection sexual selection genetic drift It is not logical or an example of design Because cardiology is full of special terminology I highly recommend that you print this paper out and take notes in the margins When you encounter a word you do not know look at the parts of the word and try to figure out what it means Then look the word up and write the definition close to the word so you can refer to it later I have also included some definitions and figures to supplement the paper below Definitions Systole phase of the cardiac cycle in which the heart contracts squeezing fluid out into the arteries Diastole phase of the cardiac cycle in which the heart muscle relaxes allowing the heart to passively fill with fluid Myocardium muscular tissue of the heart Pericardium membrane that surrounds the heart Aorta large artery directly attached to the heart Intravascular within the vasculature or the circulatory system Interstitial between parts of the interstitium or all the tissues outside the circulatory system Slide on compliance from class 9 3 Activity Key https utexas instructure com courses 1099761 files 35187397 download verifier SXRI5pXdON5DsBrQ3a18O6EgQPuaiLxwwpHyQY7x wrap 1 https utexas instructure com courses 1099761 files 35187397 download verifier SXRI5pXdON5DsBrQ3a18O6EgQPuaiLxwwpHyQY7x wrap 1
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