Also found in: Dictionary. Related to Investment income: Net Investment Income, Interest income. The revenue from a portfolio of invested assets. The income one derives from capital gains, dividends, and other activities related to the purchase and sale of securities. This differs from wages and salary primarily in that one does not need to work for investment income. One can manage one's investments oneself, or one can hire a money manager to do it.
Heart, How It Works. The normal heart is a strong, muscular pump a little larger than a fist. It pumps blood continuously through the circulatory system. Each day the average heart beats (expands and contracts) 100,000 times and pumps about 2,000 gallons of blood. In a 70-year lifetime, an average human heart beats more than 2.5 billion times. The circulatory system is the network of elastic tubes that carries blood throughout the body.
How Much Blood Does the Heart Pump? â Test your knowledge. How many gallons of blood does the heart pump each day?