Sprain has to do with the ligaments (torn ligaments) while strain has to do with an over-worked or over-stretched muscle
I would recommend googling it. but maybe it's of older body cells. no clue tho
If you stand tall make eye contact have your arms crossed and say no in a firm voice
Answer:
Three layers of tissue form the heart wall. The outer layer of the heart wall is the epicardium, the middle layer is the myocardium, and the inner layer is the endocardium.
<span>The human body is composed of elements of nature and of different density: fat, bone, protein, water. In a healthy person, these are kept in constant proportions whatever <span>the environment.</span></span>