Capillary Permeability (also known as Permeability, Capillary, Capillary Permeabilities): The property of blood capillary ENDOTHELIUM that allows for the selective exchange of substances between the blood and surrounding tissues and through membranous barriers such as the BLOOD-AIR BARRIER; BLOOD-AQUEOUS BARRIER; BLOOD

NIH MeSH · D002199Phenomena and Processes

Capillary Permeability

Also known asPermeability, Capillary · Capillary Permeabilities · Permeabilities, Capillary · Permeability, Microvascular · Microvascular Permeability · Microvascular Permeabilities · Permeabilities, Microvascular · Vascular Permeability · Permeabilities, Vascular · Permeability, Vascular · Vascular Permeabilities

Definition

The property of blood capillary ENDOTHELIUM that allows for the selective exchange of substances between the blood and surrounding tissues and through membranous barriers such as the BLOOD-AIR BARRIER; BLOOD-AQUEOUS BARRIER; BLOOD-BRAIN BARRIER; BLOOD-NERVE BARRIER; BLOOD-RETINAL BARRIER; and BLOOD-TESTIS BARRIER. Small lipid-soluble molecules such as carbon dioxide and oxygen move freely by diffusion. Water and water-soluble molecules cannot pass through the endothelial walls and are dependent on microscopic pores. These pores show narrow areas (TIGHT JUNCTIONS) which may limit large molecule movement.

MeSH classification

  • G03.143.330
  • G09.330.165

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Common questions about Capillary Permeability

What does Capillary Permeability mean in medicine?
The property of blood capillary ENDOTHELIUM that allows for the selective exchange of substances between the blood and surrounding tissues and through membranous barriers such as the BLOOD-AIR BARRIER; BLOOD-AQUEOUS BARRIER; BLOOD-BRAIN BARRIER; BLOOD-NERVE BARRIER; BLOOD-RETINAL BARRIER; and BLOOD-TESTIS BARRIER. Small lipid-soluble molecules such as carbon dioxide and oxygen move freely by diffusion. Water and water-soluble molecules cannot pass through the endothelial walls and are dependent on microscopic pores. These pores show narrow areas (TIGHT JUNCTIONS) which may limit large molecule movement. 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 Capillary Permeability known by any other names?
Yes. Capillary Permeability is also referred to as Permeability, Capillary, Capillary Permeabilities, Permeabilities, Capillary, Permeability, Microvascular 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 Capillary Permeability sit in the medical classification?
Capillary Permeability falls under the broader medical category "Phenomena and Processes" in the MeSH hierarchy (tree numbers: G03.143.330, G09.330.165). 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 Capillary Permeability?
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Source: NIH MeSH 2026 (D002199) — National Library of Medicine, public domain. View official MeSH record ↗