PSL201Y1 Chapter Notes -Pulmonary Circulation, Thoracic Vertebrae, Intrapleural Pressure
Document Summary
Internal respiration (cellular respiration): refers to the use of oxygen within mitochondria to generate atp by oxidative phosphorylation, and the production of carbon dioxide as a waste product. External respiration: refers to the exchange of oxygen and carbon dioxide between the atmosphere and body tissues, which involves both the respiratory and circulatory systems. Each lung is divided into lobes: right lung 3 lobes, left lung 2 lobes. Air gets into and out of the lungs by way of the upper airways and a network of tubes forming a system of passageways called the respiratory tract. Air enters the nasal cavity and/or the oral cavity, both leading to the pharynx (a muscular tube that serves as a common passageway for both air and food). Food enters the esophasgus (a muscular tube leading to the stomach); air enters the larynx. Can be functionally divided into a conducting zone and respiratory zone.
