Answer:
Our limbs, such as our arms and legs, grow basically at the same time and to the same length. ... Scientists are still unsure of how exactly human arms, legs, ears, or lungs grow in such a symmetrical way.
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.
It isn't literal. It's a war quote meaning if you put in good and hard effort, it can save your life. In my oppinion, that can relate to more situations and circumstances in life though.
