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 ]

This is just here as a test because I lose it

Term information

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.

has exact synonym

rachis of feather

has related synonym

main shaft of feather

feather shaft

id

UBERON:0008288

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