A pilot is someone who is in the aviation industry, and who is able to operate aircraft in order to transport passengers or goods from one location to another. They are employed by commercial airlines, corporations, or governments.
Contraction of these deep core muscles provides segmental stabilisation of the spine. The outer unit consists of many muscles such as the Obliquus externus, Obliquus internus, Erector spinae, Latissimus dorsi, Gluteus muscles, the Quadratus lumborum, adductors and hamstrings.
The muscular walls of the heart consist of three major layers. The bulk of the walls is made up of a layer of cardiac muscle and is called the myocardium. The muscle is enclosed on the outside by the epicardium and on the inside by the endocardium. The heart is also covered completely by a protective sac called the pericardium.