BIOLOGY 3 Lecture Notes - Lecture 20: Cellular Respiration, Bronchus, Exhalation
Document Summary
Healthy pink, rounded, spongy in texture. At rest, almost completely full the chest cavity. External surface linked to lining of the chest cavity by two thing membranes that stick together because they"re moist. If the membranes become separated, air will enter the space between them causing the underlying lung to collapse. Lungs flows through the bronchi and bronchioles each of which have dead end structures called: Alveoli: 300 million tiny sacs within out lungs that contain the respiratory surface: tissue across which gases from inside the body are exchanged with gases in the air. Area: tennis court; large surface are required to supply oxygen and remove carbon dioxide from large-bodied, active mammals. Capillaries: surrounding the alveoli; blood vessels connecting the gases exchanged in these structures with the entire body. Reduction in the total amount of respiratory surface results in shortness of breath,
