The Coronary Arteries vessel directly supplies the Hear muscle with Blood.
Genetic variation allows for a greater chance of a population surviving. For example, if a plant species acquires a disease, without genetic variation the disease would just keep getting passed on to the next identical organism and the population would decline and eventually die. But genetic variation prevents that from happening, because you have so many other species in the ecosystem, and genetic variation is a product of sexual reproduction meaning that the offspring of the diseased plant has a possibility of not inheriting the disease.
<span>The answer is mass and high-level force production.
As boys grow, they become taller and gain body mass. During this time, muscle changes as well, first in mass and second in high level force production.</span>
