Licensing

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CIL:35970^* Cite

Description

Figures 342 (upper) and 343 (lower) from Chapter 14 (Sperm Flagellum) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Cross sections of spermatozoa from the caddis fly (Polycentropus, upper) and mosquito (Culex, lower) provide examples of variation in the microtuble organization of motile flagella. In contrast to common 9 + 2, or 9 + 9 + 2, the caddis fly shows a 9 + 7 organization, whereas the mosquito exhibits 9 + 9 + 1 pattern. Images by David Phillips; Fig 343 from Phillips, J. Cell Biol. 40:28-43, 1969. A PDF copy of the accompanying chapter is available on the ASCB’s BioEDUCATE website.

Biological Sources

NCBI Organism Classification: Polycentropus; Culex
Cell Type: sperm
Cellular Component: axoneme; microtubule-based flagellum

Biological Context

Biological Process: fertilization

Attribution

Names: Don W. Fawcett; David Phillips
Published: ISBN 0721635849
Link: http://www.ascb.org/bioeducate/FawcettTheCell...

Citation

Digital Object Identifier (DOI): doi:10.7295/W9CIL35970
Archival Resource Key (ARK): ark:/b7295/w9cil35970

Grouping This image is part of a group.

Imaging

Image Type: transmission electron microscopy (TEM)
Image Mode: illumination by electrons; detection of electrons
Parameters Imaged: electron density
Source of Contrast: stain with broad specificity
Visualization Methods: osmium tetroxide
Data Qualifiers: processed data

Sample Preparation

Methods: crosslinking-fixative fixed tissue; tissue in plastic embedment
Relation To Intact Cell: microtome-sectioned tissue

Dimensions

Spatial Axis	Image Size	Pixel Size
X	880px	——
Y	1266px	——