Sentences with columella
col·u·mel·la
C c - Zigzag chevrons also occur within the axial columella, generally in two or three parallel rows that may be confined to particular growth bands, thus defining layers in columellar stereoplasm.
- The primary, stout capillitial branches arise from the upper part of the columella, dichotomously branching into flexuose threads.
- It differs from the Austrian species by having weaker columellar folds.
- Three beautiful specimens are assigned to this new species, which is characterized by step-like whorls, coarse and prominent collabral costae and spiral caring on the ramp, and a columellar lip with two folds.
- In maize, endodermal cells are also involved in lateral root formation, giving rise to the newly formed epidermis and columella, while the remaining root-types are formed by the pericycle.
- The stapes has neither a columella nor a stapedial foramen.
- The attachment site of the large Crepidula on the ventral side of the host shell and the presence of algal or sponge borings through the columella of the host indicate that the Oliva shell was possibly occupied by a hermit crab.
- In amphibians, the columella shares the oval window with a second bone, the operculum, which communicates by way of an opercular muscle with the pectoral girdle.