Alveoli in cross-section showing basic structural entities: cappilaries, macrophage, alveolus and cell producting surfactant.

---

Size: 5000px × 3333px
Photo credit: © Olha Pohrebnyak / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: aerobic, alveoli, alveolus, biology, blood, breathe, capillaries, capillary, cell, cells, circulation, connective, exhalation, inhalation, lung, lungs, macrophage, medicine, oxygen, pulmonary, red, respiratory, science, surfactant, system, tissue, wall