Business cycle,U.S. Note that the average expansion cycle since 1945 averages 5 years. The average since 1854 is 4 years. The longest recorded was 1961 to 1969, 8 1/2 years.We are near the end one of the most prosperous cycles in U.S. history. The last recession ended in march 1991.As of the present, we are in the ninth year of expansion. The probability of recession in 2000 is extremely high, and a virtual certainty.ote that the average expansion cycle since 1945 averages 5 years. The average since 1854 is 4 years. The longest recorded was 1961 to 1969, 8 1/2 years.
The cardiovascular system also consists of the veins, arteries and capillaries that route blood... The heart is part of the cardiovascular system and works like a pump to move blood throughout the body. The cardiovascular system also consists of the veins, arteries and capillaries that route blood...
The heartbeat happens as follows: 1  The SA node (called the pacemaker of the heart) sends out an electrical impulse. 2  The upper heart chambers (atria) contract. 3  The AV node sends an impulse into the ventricles. 4  The lower heart chambers (ventricles) contract or pump.