feather rachis

Term ID

UBERON:0008288

Synonyms

• feather shaft
• main shaft of feather
• rachis
• rachis of feather

Definition

The long solid, tubular extension of the calamus above the skin. The rachis contains pith, which is composed of air-filled keratinised epithelial cells surrounded by a solid keratinised outer cortex. https://en.wikivet.net/Feather_-_Anatomy_%26_Physiology

References

• BTO:0002401

Ontology

Uberon Ontology