Located in the chest (or thoracic) cavity, the lungs rest on the diaphragm. Each lung is connected to the trachea, which brings air in on inspiration and carries it away on expiration. Prior to its entry into the lungs, the trachea forms two bronchi. Each enters a lung near its middle and subdivides into smaller and smaller passages called bronchioles. The smallest tubes open into tiny air sacs called alveoli. Each alveolus contains blood vessels called capillaries that take up oxygen and... więcej

Magill’s Medical Guide (Online Edition), 2023. 3p.