Aids is a virus that originated within the homosexual group. The first origin of HIV is debated, however one of the most common theories suggests that HIV began in the Congo, when a homosexual man has bestality sex with a primate (baboon) which carried SIV (similar to the human form: HIV).
This theory is debated, however I personally believe it. There are many solid and factual studies that support this theory.
The stage of the heart cycle in which the heart muscle is relaxed<span>, allowing the chambers to fill with blood. ... The </span>stage of the heart cycle in which the heart muscle<span> contracts and the chambers pump blood. Systolic Pressure. Blood pressure in the arteries during contraction of the ventricles</span>