phagocytosis
Let an agent explain phagocytosis and its steps, relay its roles in immunity, tissue clearance and feeding, describe related processes and disorders, and distinguish it from other forms of endocytosis.
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 phagocytosis and its steps, relay its roles in immunity, tissue clearance and feeding, describe related processes and disorders, and distinguish it from other forms of endocytosis.
The process by which a cell engulfs a large particle such as a bacterium, dead cell or debris by extending its membrane around it to form an internal vesicle, the phagosome, which fuses with lysosomes for digestion; phagocytosis is carried out by specialised immune cells such as macrophages and neutrophils and by amoebae as feeding, includes the clearance of apoptotic cells, and its dysregulation appears in conditions such as haemophagocytosis.
What it is for: Removing pathogens, debris and dead cells; feeding in some organisms.
It can be explain the process and steps; relay roles in immunity and clearance; describe related disorders; distinguish from other endocytosis.
Distinguishing features
Large particle uptake
Receptor recognition
Phagosome-lysosome fusion
Immune and feeding roles
What it looks like
Not visible to the eye; seen by microscopy as a cell engulfing a particle.
Physical character
particle size: over about 0.5 micrometres - typical threshold
How it is recognised
Engulfment of large particles into a phagosome
By macrophages, neutrophils, amoebae and others
Pinocytosis takes fluid; receptor-mediated endocytosis takes small cargo
Related models
is a kind of - in registry terms
is a kind of - the large-particle form
is performed by - such as macrophages
is part of - the defence system
In practice
Families and kinds
phagocytosis of pathogens by immune cells
clearance of apoptotic cells, or efferocytosis
phagocytosis as feeding in amoebae and other protists
cytophagocytosis of whole cells
haemophagocytosis as a pathological form
Identifiers
Gene Ontology GO:0006909 phagocytosis
Standards and regulation
No regulation; research standards and nomenclature
Failure modes and hazards
Immune deficiency when impaired
Pathological haemophagocytosis in haemophagocytic syndromes
Pathogens evading phagocytosis
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.phagocytosis
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 How phagocytosis works.
Science.
Steps
Steps.
Steps
Steps.
- What are the steps of phagocytosis, from recognition to digestion? definition
- Is the process phagocytosis or another form of endocytosis? boundary
Cells
Phagocytes.
Cells
Cells.
- Which cells perform phagocytosis, and how do they recognise targets? definition
- Which entry fits macrophage? action
Roles Roles.
Science.
Immunity
Immunity.
Immunity
Immunity.
- How does phagocytosis defend against pathogens and link to adaptive immunity? provenance
- Which entry fits innate immunity? action
Clearance
Clearance of dead cells.
Clearance
Clearance.
- How are apoptotic cells cleared, and why does it matter for inflammation? provenance
- Which references are standard? provenance
Disease Disorders and evasion.
Clinical.
Disorders
Disorders.
Disorders
Disorders.
- Which disorders involve defective or excessive phagocytosis, such as chronic granulomatous disease and haemophagocytic syndromes? provenance
- Is the user asking about a personal condition, which needs a clinician? boundary
Evasion
Pathogen evasion.
Evasion
Evasion.
- How do pathogens evade or exploit phagocytosis? provenance
- Which entry fits immune evasion? action
Context Feeding and history.
Context.
Feeding
Feeding in protists.
Feeding
Feeding.
- How do amoebae and other protists use phagocytosis to feed? provenance
- Which entry fits amoeba? action
History
History.
History
History.
- How did Metchnikoff discover phagocytosis, and how did the field develop? provenance
- Which sources are cited? provenance
What the second pass must settle
- Should efferocytosis be a separate entry?
- How should Gene Ontology terms be linked?
- The registry entry has merged aliases naming subtypes and a pathological form; should they be split off?