The cardiac cycle consists of two phases; a period where the heart muscle is relaxed, called <u>diastole</u>, and a period of contraction, called <u>systole</u>.
These are then divided into four stages. These are; 
1.<u>Ventricular Filling Period (VPF)</u>
2. <u>Isovolumetric Contraction Period (ICP)</u>
3. <u>Ventricular Ejection Period (VEP)</u>
4.<u> Isovolumetric Relaxation Period (IRP)</u>
At rest, cardiac diastole lasts for approximately 0.5 seconds, and cardiac systole lasts approximately 0.3 seconds to complete. However, during exercise, when the heart rate is increased the time period of <u>diastole</u> , especially, is reduced. 
 
        
             
        
        
        
Eat healthy and exercise 6 days a week and have set times for meals and snacks.
        
             
        
        
        
Answer: NATO and the Warsaw Pact were two competing alliances during COLD WAR time period.
Explanation:
Cold war was an era that started immediately after the second world war.This was to be a long lasting and continuing confrontation between the Soviet Union and the United States, lasting from 1945 to 1989. It was called the Cold War because neither the Soviet Union nor the United States officially declared war on each other.
The two major cold war alliances were the NATO (North Atlantic Treaty Organisation) and the Warsaw Pact. The countries that make up the NATO includes Britain, France, the United States, Canada, and eight other western European countries while Warsaw pact was created by Soviet Union.
For years the both alliances never engaged in military war but developed strategic policies aimed at the containment of each other in Europe while working and fighting for influence within the wider Cold War on the international stage. I hope this helps, thanks!
 
        
             
        
        
        
The term commercial refers to activities of commerce, business operations intended for an exchange on the market with the goal of earning profits. The non-commercial activity also exists in the form of non-profit organizations or government agencies. Hope this helps you!