vein

Also known as vena, veins

A vein () is a blood vessel in the circulatory system of humans and most other animals that carries blood towards the heart. Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are those of the pulmonary and fetal circulations which carry oxygenated blood to the heart. In the systemic circulation, arteries carry oxygenated blood away from the heart, and veins return deoxygenated blood to the heart, in the deep veins.

AI overview

A vein is a blood vessel that carries blood back toward the heart as part of the circulatory system in humans and other animals. Most veins transport blood that has lost its oxygen as it passed through the body's tissues, though a few exceptions like the pulmonary veins carry oxygen-rich blood instead.

AI-generated from the Wikipedia summary — may contain errors.

Key facts

Anatomy.Name: Vein
Anatomy.Latin: vena
Anatomy.Image: Vein (retouched).svg
Anatomy.Caption: Structure of a vein, which consists of three main layers: an outer layer of connective tissue, a middle layer of smooth muscle, and an inner layer lined with endothelium.
Anatomy.Width: 200px
Anatomy.System: Circulatory system

via Wikipedia infobox

Research

467,257 papers

Near-Infrared Vein Visualization in Index Finger Pollicization.ReviewThe Journal of hand surgery · 2017Ficke BW, Ransom EF, Oakes JEDOI: 10.1016/j.jhsa.2017.03.039
Launay's External Carotid Vein.Medicina (Kaunas, Lithuania) · 2021Manta MD, Jianu AM, Rusu MC et al.DOI: 10.3390/medicina57090985
Vein Morphology in Endoscopic Vein Harvesting: 15-Year Outcomes.Innovations (Philadelphia, Pa.) · 2023Lee JY, Pedula KL, Berkley TO et al.DOI: 10.1177/15569845231204363
Deep medullary vein engorgement and superficial medullary vein engorgement: two patterns of perinatal venous stroke.ReviewPediatric radiology · 2021Khalatbari H, Wright JN, Ishak GE et al.DOI: 10.1007/s00247-020-04846-3
Historical overview of varicose vein surgery.ReviewAnnals of vascular surgery · 2010van den Bremer J, Moll FLDOI: 10.1016/j.avsg.2009.07.035
Deep vein sclerosis following sclerotherapy: Ultrasonic and d-dimer criteria.Phlebology · 2020Parsi K, Panozzo B, Bull A et al.DOI: 10.1177/0268355519873534
Fate of the tributaries of sapheno femoral junction following endovenous thermal ablation of incompetent axial vein - A review article.ReviewPhlebology · 2019Anwar MA, Idrees M, Aswini M et al.DOI: 10.1177/0268355518783635
Varicose veins.ReviewVascular medicine (London, England) · 2015Heller JA, Evans NSDOI: 10.1177/1358863X14566224

via PubMed

Described at

Turkic Database at Elegant Lexicon

A searchable database of lexical items in the Turkic languages

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Wikidata facts

Image: Venous system en.svg

Show 4 more facts

Commons category: Veins
equivalent class: schema.org/Vein
NCI Thesaurus ID: C12814
described at URL: turkic.elegantlexicon.com/turkforms.php?form=veinvein

Sources (7)

via Wikidata · CC0

~30 min read

Article

25 sections

Contents

Structure
Venous system
Venous valves
Circulatory routes
Microanatomy
Development
Function
Clinical significance
Venous insufficiency
Venous thrombosis
Deep vein thrombosis
Superficial vein thrombosis
Portal hypertension
Phlebitis
Compression
Vascular anomalies
Venous access
Imaging
Recognition techniques
History
See also
References
Bibliography
Further reading
External links

There are three sizes of veins: large, medium, and small. Smaller veins are called venules, the smallest of which are called post-capillary venules – microscopic veins that play a major role in microcirculation. Veins are often closer to the skin than arteries.