In the body, cyanide in small amounts can also combine with another chemical to form vitamin B12, which helps maintain healthy nerve and red blood cells. In large doses, the bodyâs ability to change cyanide into thiocyanate is overwhelmed. Large doses of cyanide prevent cells from using oxygen and eventually these cells die. The heart, respiratory system and central nervous system are most susceptible to cyanide poisoning.
Many think of the upper class in terms of the 1%. To be in the richest 1% nationally, a household needs to have the annual income of at least $389,436, according to the Economic Policy Institute. But one could argue that the upper class is larger than that if you look at America as a whole. The Upper Middle Class According to census data from 2015, 6.1% of households bring in $200,000 and higher every year and 14.1% bring in between $100,000 and $150,000. This is the upper middle class.
1 Income Range: There are some economists who say that anyone who makes between $25,000 and $100,000 a year is middle class. That might be surprising to some, though.  Median Income: Others take a look at the median annual income, and then go $20,000 to either side.