You can elect to use a 52-53-week tax year if you keep your books and records and report your income and expenses on that basis. If you make this election, your 52-53-week tax year must always end on the same day of the week.
Forced Inhalation. Involved in the mechanics of breathing; The muscles involved in this type of breathing are the diaphragm, the external intercostal muscles, and the accessory respiratory muscles (activated when respiration increases significantly).
Several muscles located in the neck may also contribute to the work of breathing during exercise. The sternocleidomastoid muscle, which runs from the back base of your skull down to your chest, may be called to action during periods of strenuous exercise.