| 释义 |
medulla of hair shaft me·dul·la of hair shaftthe central axis of some hairs, containing a column of large vacuolated and keratinized cells; the medullary portion is surrounded by the cortex.me·dul·la of hair shaft (mĕ-dŭl'ă hār shaft) The central axis of some hairs, containing a column of large vacuolated and keratinized cells; the medullary portion is surrounded by the cortex. |