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 high resolution view of a dividing Didinium nasutum. This large ciliate is capable of engulfing Paramecium. It has a thick ectoplasm containing numerous mucocysts embedded in its extensive epiplasm....

Transmission electron micrograph of a section through a 3-day old chick embryo obtained from an egg that was maintained in a cold room for 24 hrs. Ribosomes have crystallized both in the cytoplasm an...

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...

Figure 301 from Chapter 12 (Centrioles) of 'The Cell' by Don W. Fawcett M.D. Centrioles are usually positioned so that their long axes form a right angle. Their perpendicular orientation is maintained...

A contractile vacuole in systole. The CV has collapsed into vesicles and tubules. Three CV pores can be seen where the CV meets the pellicle. Smooth membrane cisterna surrounds some cytoplasm, possibl...

A dividing Didinium nasutum. This large ciliate is capable of engulfing Paramecium. It has a thick ectoplasm containing numerous mucocysts embedded in its extensive epiplasm. Its external surface is c...

This figure shows the connection between the peristome and the food vacuole forming zone where the alveoli end. The cytostome is the opening that connects these two zones. TEM taken on 6/13/69 by R. ...

The peristome is covered on one side by the oral cilia and on the opposite by the ribbed wall. Lamellae from the ribbed wall extend into the nascent food vacuole forming region, the cytopharynx. This ...

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