Ch. 18.1 The Respiratory System

Lesson Vocabulary: respiratory system, cellular respiration
18.1 Review
1. in the respiration process, to release energy
2. Nose, throat, trachea, and bronchial tubes carry air in and out of the lungs, where gas exchange occurs. Diaphragm and ribs move to cause lungs to expand.
3. also filters air and aids in speaking, couphing, sneezing
4. Diaphragm relaxes up to its original position, pushing lungs upward. At the same time, ribs move inward, collapsing lungs inward. Air moves out of lungs through bronchial tubes into trachea, then into throat and out nose or mouth.
5. Air you inhale contains more O2 and less CO2 than air you exhale.
6. Energy is expended when you exercise; rapid breathing brings more O2 into the body, which can add more energy.