capillary
Let an agent explain capillaries and their structure, relay types, exchange mechanisms and specialised beds from physiology references, describe their role in disease, and distinguish capillaries from arterioles, venules and lymphatic vessels.
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 capillaries and their structure, relay types, exchange mechanisms and specialised beds from physiology references, describe their role in disease, and distinguish capillaries from arterioles, venules and lymphatic vessels.
The smallest blood vessels of the body, with walls a single endothelial cell thick, connecting arterioles to venules and forming networks in which oxygen, nutrients, waste and fluid are exchanged between blood and tissues, classified as continuous, fenestrated and sinusoidal capillaries by wall structure and found in specialised beds such as the pulmonary capillaries of the lung, the peritubular capillaries of the kidney, systemic capillaries throughout the body and the vas spirale of the inner ear; capillaries are central to physiology and to diseases of the microcirculation.
What it is for: Not applicable; a vessel type.
It can be explain structure and types; relay exchange mechanisms; describe specialised beds and disease; distinguish from other vessels.
Distinguishing features
Single-cell walls
Exchange function
Structural types
Organ-specific beds
What it looks like
Not a visible object without microscopy; microscopic vessels in networks.
Physical character
diameter: about 5-10 micrometres
total capillaries in the body: billions count - estimates
wall thickness: one endothelial cell note
How it is recognised
Smallest blood vessels for exchange
Continuous, fenestrated and sinusoidal capillaries; pulmonary, peritubular and systemic capillaries; vas spirale
Arterioles supply capillaries; venules drain them; lymphatic capillaries carry lymph
Related models
is a kind of - in registry terms
is a kind of - in registry terms
connects - to venules
enables - and nutrient transfer
In practice
Families and kinds
continuous capillaries
fenestrated capillaries
sinusoidal capillaries
pulmonary capillaries
peritubular capillaries of the kidney
systemic capillaries
specialised vessels such as the vas spirale
Identifiers
FMA 63194 capillary
MeSH D002196 capillaries
Standards and regulation
Anatomical terminology standards
No regulation
Failure modes and hazards
Confusing capillaries with arterioles or lymphatics
Agents giving personal medical advice on microvascular disease
Mixing the physical capillary action sense
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.capillary
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What capillaries are.
Science.
Definition
Definition.
Definition
Definition.
- What are capillaries, and how do they differ from arterioles, venules and lymphatic capillaries? definition
- Is the question about blood capillaries, a specific bed or the physical sense of capillary action? boundary
Types
Types and beds.
Types
Types.
- How do continuous, fenestrated and sinusoidal capillaries differ, and what are the pulmonary, peritubular and systemic beds and the vas spirale? definition
- Which entry fits the specific type or bed? action
Physiology Physiology.
Science.
Exchange
Exchange.
Exchange
Exchange.
- How do diffusion, filtration and the Starling forces move substances across capillary walls? provenance
- Which references are standard? provenance
Regulation
Regulation.
Regulation
Regulation.
- How is capillary blood flow regulated by arterioles, pericytes and local signals? provenance
- Which sources are cited? provenance
Medicine Disease.
Clinical.
Disease
Microvascular disease.
Disease
Disease.
- How are capillaries involved in diabetes, hypertension, oedema and shock, in general terms? provenance
- Is the user asking about their own condition, which needs a clinician? boundary
Research
Research.
Research
Research.
- What research addresses angiogenesis and microcirculation, with findings attributed? provenance
- Which entry fits angiogenesis? action
Context History and methods.
Context.
History
History.
History
History.
- How did Malpighi discover capillaries, completing Harvey s circulation? provenance
- Which entry fits the history of physiology? action
Methods
Methods.
Methods
Methods.
- How are capillaries imaged and studied, from capillaroscopy to intravital microscopy? provenance
- Which entry fits capillaroscopy? action
What the second pass must settle
- Should the capillary types and microcirculation be separate primary entries?
- How should physiology references be linked?
- The registry entry has merged aliases naming specialised beds and types; should they be split off?