vein
Let an agent explain veins and their structure and function, identify kinds and major venous systems, relay clinical conditions in general terms, and distinguish veins from arteries and lymphatics.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain veins and their structure and function, identify kinds and major venous systems, relay clinical conditions in general terms, and distinguish veins from arteries and lymphatics.
A blood vessel that carries blood toward the heart, in most cases deoxygenated blood from tissues, with thinner walls and lower pressure than arteries and valves in many limb veins to prevent backflow; veins form systemic and pulmonary networks, include superficial, deep and perforating veins and special systems such as the hepatic portal system, and are the site of conditions such as varicose veins and thrombosis.
What it is for: Returning blood to the heart.
It can be explain structure and function; identify kinds and systems; relay clinical conditions in general terms; distinguish from arteries and lymphatics.
Distinguishing features
Toward the heart
Low pressure and thin walls
Valves in many veins
Capacitance function
What it looks like
Blue-appearing vessels visible under the skin; thin-walled vessels in anatomy.
Physical character
share of blood volume: about 60-70 percent - held in veins
How it is recognised
Vessel carrying blood toward the heart
Superficial, deep, perforating and portal veins
Arteries carry blood away from the heart; lymphatics carry lymph
Related models
is a kind of - in registry terms
is a kind of - in registry terms
is contrasted with - carrying blood away from the heart
returns blood to - the pump
In practice
Families and kinds
superficial and deep veins of the limbs
perforating veins
pulmonary veins carrying oxygenated blood
the hepatic portal venous system
embryonic veins such as the posterior cardinal veins
named veins such as the intercapitular veins of the foot
Identifiers
TA2 veins Terminologia Anatomica
MeSH D014680 veins
Standards and regulation
Clinical guidelines on venous disease and thrombosis
Standards for venous access and phlebotomy
Failure modes and hazards
Deep vein thrombosis and embolism
Varicose veins and venous insufficiency
Agents giving personal medical advice
Also called
+64
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.vein-animal
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Anatomy Structure and function.
Science.
Structure
Structure.
Structure
Structure.
- How are veins built, and how do they differ from arteries? definition
- Is the vessel a vein, an artery or a lymphatic? boundary
Systems
Venous systems.
Systems
Systems.
- What are the major venous systems, including the portal system and pulmonary veins? definition
- Which entry fits the specific vein or system? action
Function Physiology.
Science.
Return
Venous return.
Return
Return.
- How do valves, muscle pumps and pressure drive venous return? provenance
- Which entry fits venous return? action
Capacitance
Capacitance.
Capacitance
Capacitance.
- Why do veins hold most of the blood volume, and how does that matter in circulation? provenance
- Which references are standard? provenance
Clinical Conditions and procedures.
Clinical.
Conditions
Conditions.
Conditions
Conditions.
- What conditions affect veins, from varicose veins to thrombosis, in general terms? provenance
- Is the user describing leg swelling or pain, which needs a clinician? boundary
Procedures
Access and procedures.
Procedures
Procedures.
- How are veins used for blood draws, infusions and procedures? provenance
- Which entry fits venous access? action
Context Development and history.
Context.
Development
Development.
Development
Development.
- How do veins develop in the embryo, including the cardinal veins? provenance
- Which entry fits embryology? action
History
History.
History
History.
- How was the venous circulation understood, from Galen to Harvey? provenance
- Which sources are cited? provenance
What the second pass must settle
- Should the portal system and pulmonary veins be separate entries?
- How should clinical guidelines be linked?
- The registry entry has merged aliases naming specific veins and systems; should they be split off?