1 Increasing thoracic volume results in decreased pleural pressure, increased alveolar volume, decreased alveolar pressure, and air movement into the lungs.  Decreasing thoracic volume results in increased pleural pressure, decreased alveolar volume, increased alveolar pressure, and air movement out of the lungs.
Freebase(5.00 / 1 vote)Rate this definition: Orchard. An orchard is an intentional planting of trees or shrubs that is maintained for food production. Orchards comprise fruit or nut-producing trees which are grown for commercial production. Orchards are also sometimes a feature of large gardens, where they serve an aesthetic as well as a productive purpose.
Definition of apple. 1  1 : the fleshy, usually rounded red, yellow, or green edible pome fruit of a usually cultivated tree (genus Malus) of the rose family; also : an apple tree â compare crab apple. 2  2 : a fruit (such as a star apple) or other vegetative growth (such as an oak apple) suggestive of an apple.