The word 'bloody' is a colloquialism. It is a swear word that many people find offensive that is used to emphasize a comment or an angry statement. It is used to highlight someone or something in a negative light, for example: if your car had broken down, you would say: 'that bloody car'. It is frequently used as 'bloody hell' that means ' 'oh no' .The origin of the word was to swear upon the bloody death (Of Christ) Or the cross.
Blood represents 1/13 of the total weight of the human body. It circulates through the arteries, capillaries and veins. Consists of a liquid part called plasma and a solid part which are cells: red blood cells, white blood cells and platelets.
You should do exercise for 20 minutes three days a week to burn 300 kcal so that your heart is in good shape.