Chapter

 1 Pref|       be there, that they may prevent the return of the blood
 2 Pref|       cuspidate valves do not prevent the egress of fuliginous
 3 Pref|      should the mitral valves prevent the regurgitation of air
 4 V   |      the orifice of the aorta prevent the return of the blood
 5 VI  |    artery and aorta; but they prevent all regurgitation from the
 6 VII |      that there is nothing to prevent it from being so, appears
 7 VII |     artery, which effectually prevent the blood sent into the
 8 VII | common use, and that it is to prevent regurgitation or backward
 9 XI  |   however, whilst it does not prevent the force of the pulse from
10 XIII|     the less, they completely prevent it; they are farther so
11 XIII|    are so contrived that they prevent the blood from rising upwards;
12 XIII|     right direction, entirely prevent all such contrary motion,
13 XIII|     arrangement plainly is to prevent all motion of the blood
14 XIII|    pulmonary artery, viz., to prevent all reflux of the blood
15 XIII|        do not seem totally to prevent the passage of the blood
16 XIII|    way as to compress it, and prevent any blood from passing upwards