Spiritual gifts are not innate, natural talents, like an ear for music or the ability to draw, but rather they are empowerments that the Holy Spirit gives to a believer to minister to the body in ways that were not possible by mere natural effort apart from the Holy Spirit.
In the design of a dam, the first step is the determination of various forces which acts on the structure and study their nature. Depending upon the situation, the dam is subjected to the following forces: 1. Water pressure. 2. Earthquake forces. 3. Silt pressure. 4. Wave pressure. 5. Ice pressure. 6.
Answer Wiki. The ventricles have extremely strong musculature - much more powerful than the atria. So, during ventricular systole, their is massive force generated to pump the blood into the great vessels. If the AV valves werent there, then the blood would shoot up right back into the atria and create a WTF situation. We see this in conditions called Mitral regurgigation, or Tricuspid insufficiency.