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*CIL – Cell Image Library accession number. Please use this to reference an image.

CIL:39463*  Cite 

Food vacuoles arise from the single membrane that lines the cytopharynx. Vesicles, similar to discoidal vesicles, attach to the cytopharyngeal microtubules (lamellar clumps) that arise from the dorsal ribbed wall of the peristome and that pass beyond the cytosome. The cytopharynx swells and a food vacuole balloons out through the ribs that are produced by the folded cytopharyngeal membrane and the attached lamellae. How, why and when a food vacuole pinches off needs further study. A myoneme equivalent to the cytostomal cord in Paramecium lies along the origins of the lamellae (called cytopharyngeal ribbons in Paramecium). TEM taken on 3/30/71 by R. Allen with Hitachi HU11A operating at 75kV. Mag. 9,250X. The raw negative was scanned with an Epson Perfection V750 Pro and this high resolution image is best used for quantitative analysis. Additional information available at (

Technical Details

Standard glutaraldehyde fixation followed by osmium tetroxide, dehydrated in alcohol and embedded in an epoxy resin. Microtome sections prepared at approximately 75nm thickness. Additional information available at (

Biological Sources
NCBI Organism Classification
Vorticella convallaria
Cell Type
cell by organism
eukaryotic cell
Eukaryotic Protist
Ciliated Protist
Cell Line
Cambridge Culture Collection, Cambridge, England, # LB1690/1
Cellular Component
oral apparatus
food vacuole
cortical microtubule cytoskeleton
Biological Context
Biological Process
response to food
digestive system process
Richard Allen (University of Hawaii)
Digital Object Identifier (DOI)
Archival Resource Key (ARK)
Grouping This image is part of a group.
Image Type
transmission electron microscopy (TEM)
illumination by electrons
Image Mode
detection of electrons
Parameters Imaged
electron density
Source of Contrast
stain with broad specificity
Visualization Methods
stain with broad specificity
osmium tetroxide
uranyl salt
lead salt
Processing History
recorded image
Data Qualifiers
raw, unprocessed data
suitable for spatial measurements
Spatial Axis Image Size Pixel Size
X 3537px 1.1nm
Y 4000px 1.1nm