alveolus of lung

Spherical outcropping of the respiratory bronchioles and primary site of gas exchange with the blood. Alveoli are particular to mammalian lungs. Different structures are involved in gas exchange in other vertebrates[WP]. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the alveolus of lung is

Spherical outcropping of the respiratory bronchioles and primary site of gas exchange with the blood. Alveoli are particular to mammalian lungs. Different structures are involved in gas exchange in other vertebrates[WP]. The atlas records it as a organ at the organ scale in the human body.

Where the alveolus of lung is

It sits in the thorax and trunk, within the respiratory system. Positioned deliberately as part of this species body plan.

What the alveolus of lung connects to

The atlas records 18 typed relationships for it, across 8 kinds of connection. part of lung, pulmonary acinus and alveolar sac.

Supply and innervation

Arterial supply: intra-acinar arteriole. Venous drainage: intra-acinar venule.

Also called

Also recorded as alveolus, alveolus pulmonis, lung alveolus, pulmonary alveolus, respiratory alveolus and alveoli, and 1 more. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0002299, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: lung, pulmonary acinus and alveolar sac.
• A kind of: alveolus and organ system subdivision.
• contains: alveolar atrium, alveolar wall, epithelial lining fluid, lumen of pulmonary alveolus, pulmonary alveolar parenchyma and pulmonary alveolus epithelium.
• contributes to morphology of: pulmonary acinus, alveolar wall and pulmonary alveolus epithelium.
• participates in: Respiration.
• Supplied by: intra-acinar arteriole.
• Drained by: intra-acinar venule.
• flows to: respiratory bronchiole.

Questions

Where is the alveolus of lung?

It sits in the thorax and trunk, within the respiratory system. Positioned deliberately as part of this species body plan.

What does the alveolus of lung connect to?

Part of: lung, pulmonary acinus and alveolar sac.

Is the alveolus of lung the same in other species?

Leumas holds the same relationship vocabulary for every species it carries, so where another dataset records this structure you can put the two side by side on /compare.