CSD-2260 Lecture Notes - Lecture 2: Alveolar Pressure, Pulmonary Artery, Accessory Muscle

• School: App State
• Department: Communication Sciences and Disorders
• Course: CSD-2260
• Professor: Jennifer Dalton

Document Summary

Respiration requires muscular effort, and the degree to which an individual can successfully control the musculature determines the efficiency of respiration: passive expiration- the forces inherent to the tissues restore the system to a resting position after inspiration. They stretch as the body grows, resulting in increased lung capacity. An adult"s lungs are stretched so they can fill up the rib cage/thorax when a breath is taken. An infant, whose thorax and lungs are the same size, must breath two to three times more often than adults for adequate respiration. When standing or sitting erect, gravity acts on the ribs to pull them back after they"ve been expanded through the effort of the accessory muscles of inspiration. Maximizes overall capacity because it pulls the abdominal viscera down, leaving more room for the lungs. The measurement of respiration: active expiration- muscular effort is used to push expiration just a little farther, instruments in respiration.