Answer: Depression really has profound effects on the immune system. Depression can cause increases in a variety of stress hormones such as cortisol and adrenaline and various other inflammatory substance such as interleukin-6.
There are 43,560 square feet in a acre; this is 4,840 square yards. You can find a conversion calculator at http://www.unitconversion.org/area/acres-to-square-foots-conversion.html Originally, the size of an acre was approximately the amount of land an ox could plow in a day. Now, I donât know about you, but that approximation means virtually nothing to me.
According to google, 1 acre is the equivalent of 43560 square feet. 1 acre is defined to be 1 chain (66 ft) by 1 furlong (660 ft). So an acre is 66 ft * 660 ft = 43560 sq ft. The international definition is exactly the same area, but in square meters: 4046.8564224 sq m.