Opercularia is named for a ciliated flap (operculum) that is adoral to the opening to the oral region. However, this operculum is pulled back into the body when the myonemes are fully contracted as in this figure. The cilia bordering the operculum arise from the perioral kinetids. TEM taken on 6/13/69 by R. Allen with Philips 300 operating at 60kV. Neg. 4,270X. Bar = 1?m. A print of the negative was scanned and processed in Photoshop. This image is suitable for qualitative analysis. There is a high resolution version of this image in the library (CIL:39170) which is available for quantitative analysis. Additional information available at (http://www5.pbrc.hawaii.edu/allen/).
Biological Process: Macronucleus organization, Cortical cytoskeleton organization, Cytoplasm organization, Oral apparatus organization
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 (http://www5.pbrc.hawaii.edu/allen/).
Author: Richard Allen
Source: The Cell: An Image Library