High resolution transmission electron micrograph of Halteria showing both the large macronucleus with nuclear pores, dense heterochromatin bodies and nucleolus, and the small micronucleus.

Nice view of the oral apparatus, macronuclear organization, cortex, and cytoplasm of Opercularia. Neg of unknown magnification. Estimate sizes from the approximate 0.2µm diameter of a ciliary axoneme...

A low power view of a median transverse section of a green Trichodina that lives on the surface of a freshwater snail collected in central Illinois. In this view the abundant endosymbiotic zoochlorell...

In Euplotes a replication band of the macronucleus has larger heterochromatin masses on one side of the band after DNA replication has occurred. The replication band moves in the direction of lighter...

In Euplotes a replication band of the macronucleus has larger heterochromatin masses on one side of the band after DNA replication has occurred. The replication band moves in the direction of lighter...

Ancistrum is a marine ciliate that inhabits the mantle cavity of mytiliid mussels. This image shows a good view of the macronucleus, mitochondria with tubular cristae, and what are probably flask-shap...

A view of the cytoplasm of a green Trichodina that lives on the surface of a freshwater snail collected in central Illinois. In this view the 10 endosymbiotic bacteria are evident as well as an endosy...

The macronucleus is the largest organelle in the P. multimicronucleatum cell and can measure 35µm long by 12µm wide. A small fraction of a macronucleus is seen in this micrograph. The chromatin appe...

Ancistrum is a marine ciliate that inhabits the mantle cavity of mytiliid mussels. This image shows a good view of the macronucleus, mitochondria with tubular cristae, and what are probably flask-shap...

High resolution image of elements of myonemal fibers which lie next to the epiplasm that lies internal to the plasma membrane and alveoli. A close association of the ER with the myonemes is seen. The ...