venule
Sign in to saveAlso known as venula, venules
A venule is a very small vein in the microcirculation that allows blood to return from the capillary beds to drain into the venous system via increasingly larger veins. Post-capillary venules are the smallest of the veins with a diameter of between 10 and 30 micrometres (μm). When the post-capillary venules increase in diameter to 50 μm they can incorporate smooth muscle and are known as muscular venules. Veins contain approximately 70% of total blood volume, while about 25% is contained in the venules. Many venules unite to form a vein.
Key facts
- Vein.Name
- Venule
- Vein.Latin
- venula
- Vein.Image
- Capillaries.jpg
- Vein.Caption
- Types of blood vessels, including a venule, vein, and capillaries
- Vein.Width
- 300px
via Wikipedia infobox
Research
11,556 papers- Cancer immunotherapies transition endothelial cells into HEVs that generate TCF1(+) T lymphocyte niches through a feed-forward loop.Cancer cell · 2022
- Rapid Generation of hPSC-Derived High Endothelial Venule Organoids with In Vivo Ectopic Lymphoid Tissue Capabilities.Advanced materials (Deerfield Beach, Fla.) · 2024
- Mediators of Capillary-to-Venule Conversion in the Chronic Inflammatory Skin Disease Psoriasis.The Journal of investigative dermatology · 2022
- Spatially resolved atlas of breast cancer uncovers intercellular machinery of venular niche governing lymphocyte extravasation.Nature communications · 2025
- AV-casNet: Fully Automatic Arteriole-Venule Segmentation and Differentiation in OCT Angiography.IEEE transactions on medical imaging · 2023
via PubMed
Wikidata facts
Show 2 more facts
- NCI Thesaurus ID
- C12818
- Commons category
- Venules
via Wikidata · CC0
~2 min read
Article
4 sectionsContents
- Structure
- See also
- References
- External links
A venule is a very small vein in the microcirculation that allows blood to return from the capillary beds to drain into the venous system via increasingly larger veins. Post-capillary venules are the smallest of the veins with a diameter of between 10 and 30 micrometres (μm). When the post-capillary venules increase in diameter to 50 μm they can incorporate smooth muscle and are known as muscular venules. Veins contain approximately 70% of total blood volume, while about 25% is contained in the venules. Many venules unite to form a vein.
==Structure==