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).
Best Answer: There are two main sets of muscles involved in breathing. The first is the diaphragm which is a two part leaf muscle that pulls down and flattens, when this happens it also pulls down on the bronchials of the lungs and helps to straigten them out so that the air has a more laminer shot into the lungs.est Answer: There are two main sets of muscles involved in breathing. The first is the diaphragm which is a two part leaf muscle that pulls down and flattens, when this happens it also pulls down on the bronchials of the lungs and helps to straigten them out so that the air has a more laminer shot into the lungs.