🦠 Anatomy: Oesophageal glands

Oesophageal glands are key effectors of plant parasitism in nematodes. This lesson explains their feeding role and links basic digestive function to reproductive-system terminology.

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Oesophageal and Rectal Glands

Oesophageal gland secretions help in host-cell wall modification, suppression of plant defenses, and maintenance of feeding sites. Rectal glands and posterior secretory structures may contribute to species-specific interactions.

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Feeding Phases

Two broad feeding phases are commonly discussed:

1. Salivation phase: secretion is injected into host tissue.
2. Ingestion phase: dissolved or modified cell contents are withdrawn.

Together, these phases explain how plant-parasitic nematodes convert living plant tissue into a nutritional source.

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Link with Reproductive Biology

Functional feeding success influences growth and reproductive output. Female reproductive configurations (for example monodelphic and didelphic conditions) are important anatomical descriptors used in identification.

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Summary Cheat Sheet

Topic	Key Point
Oesophageal glands	Central to parasitism and host manipulation
Salivation phase	Secretions injected into host cells
Ingestion phase	Nutrient uptake from modified tissues
Pathogenicity link	Feeding biochemistry drives symptom development
Reproductive terms	Monodelphic vs didelphic are key descriptors

Exam focus: gland function and salivation-ingestion sequence in plant parasitic nematodes.

References

1 source • [1]

[1]

Oesophageal gland function notes (PATH172)

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