Blood-Air Barrier (also known as Barrier, Blood-Air, Barriers, Blood-Air): The barrier between capillary blood and alveolar air comprising the alveolar EPITHELIUM and capillary ENDOTHELIUM with their adherent BASEMENT MEMBRANE and EPITHELIAL CELL cytoplasm. PULMONARY GAS EXCHANGE occurs across this membrane.

NIH MeSH · D015824Anatomy

Blood-Air Barrier

Also known asBarrier, Blood-Air · Barriers, Blood-Air · Blood Air Barrier · Blood-Air Barriers · Alveolocapillary Membrane · Alveolocapillary Membranes · Membrane, Alveolocapillary · Membranes, Alveolocapillary · Air-Blood Barrier · Air Blood Barrier · Air-Blood Barriers · Barrier, Air-Blood

Definition

The barrier between capillary blood and alveolar air comprising the alveolar EPITHELIUM and capillary ENDOTHELIUM with their adherent BASEMENT MEMBRANE and EPITHELIAL CELL cytoplasm. PULMONARY GAS EXCHANGE occurs across this membrane.

MeSH classification

  • A04.411.715.200
  • A07.020

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Related concepts

Alveolar Epithelial Cells

Epithelial cells that line the PULMONARY ALVEOLI.

Common questions about Blood-Air Barrier

What does Blood-Air Barrier mean in medicine?
The barrier between capillary blood and alveolar air comprising the alveolar EPITHELIUM and capillary ENDOTHELIUM with their adherent BASEMENT MEMBRANE and EPITHELIAL CELL cytoplasm. PULMONARY GAS EXCHANGE occurs across this membrane. This definition is taken from the National Library of Medicine's MeSH (Medical Subject Headings) 2026 release, which is the standard vocabulary used to index PubMed and most medical literature.
Is Blood-Air Barrier known by any other names?
Yes. Blood-Air Barrier is also referred to as Barrier, Blood-Air, Barriers, Blood-Air, Blood Air Barrier, Blood-Air Barriers in different clinical, research and patient-facing contexts. The MeSH descriptor groups all of these synonyms under a single canonical concept so research and records stay consistent.
Where does Blood-Air Barrier sit in the medical classification?
Blood-Air Barrier falls under the broader medical category "Anatomy" in the MeSH hierarchy (tree numbers: A04.411.715.200, A07.020). Browsing the related concepts on this page takes you to neighbouring topics in the same branch of medicine.
Where can I get a plain-language explanation of Blood-Air Barrier?
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Source: NIH MeSH 2026 (D015824) — National Library of Medicine, public domain. View official MeSH record ↗