An isolated and longitudinally fractured cilium exposing the middle of the cilium. The spokes extend from the doublets toward the two singlet microtubules. These spokes are spaced unevenly so they app...

Figs. 314 from Don Fawcett's Chapter 12 (Centrioles). At the base of the flagellum of a mammalian spermatid, the juxtanuclear proximal centriole is continuous (at the arrow) with a structure of simila...

Figs. 311 & 312 from Don Fawcett's Chapter 12 (Centrioles). In ciliogenesis, newly formed single centrioles, serving as basal bodies, are arranged in rows and oriented perpendicular to the cell surfac...

High resolution image of an isolated and longitudinally fractured cilium exposing the middle of the cilium. The spokes extend from the doublets toward the two singlet microtubules. These spokes are sp...

Figures 323 & 324 from Chapter 13 (Cilia and Flagella) of 'The Cell' by Don W. Fawcett M.D. The outer segments of the rods and cones of the vertebrate retina and many photoreceptors of invertebrates b...

A cross section near the proximal end of the cilium. Triangular densities link the doublets to the membrane. Bar = 0.2µm. TEM taken 7/23/65 by R. Allen with RCA EMU3F operating at 50kV. Adapted with ...

A view of the left side of the buccal cavity. It is covered by the plasma membrane, alveoli and a single partial layer of microtubules. Specialized cytoplasm lines the posterior end of this border. Or...

A cross section of cilium through the cilium-basal body complex extending from the cilium to the transition zone between the cilium and basal body and ending at the proximal tip of the basal body. Bar...

A figure from Chapter 13 (Cilia and Flagella) of 'The Cell' by Don W. Fawcett M.D. The microtubules of the axoneme are adequately preserved by routine fixation for electron microscopy of thin sections...

Four parasomal sacs showing them in longitudinal section each at the base of a surface depression. Trichocysts extend into each lateral ridge (lateral ridges do not have kinetodesmal fibers). Bulbous ...