I have often endeavoured to view the circulation of the blood in terrestrial animals, but without success, by reason that no parts… — Antonie van Leeuwenhoek Copy Share Image
God designed that the living machinery should be in daily activity. For in this activity or motion is its preserving power… The… — Ellen G. White Copy Share Image
In many organisms, including man, the mechanical respiration and the circulation of the blood are 'regulated' so as to correspond to the… — August Krogh Copy Share Image
