Capillary endothelial cells from mammalian cardiac muscle caught in the act of fluid-phase micropinocytosis. Arrows indicate multiple sites where invaginaton along the membrane suggests vesicles formi...

A thin section through a macrophage from interstitial tissue of the testes of the opossum. These cells are characterized by extensive folding of the cell surface, some of which appear to have captured...

Electron micrographs show examples of pinocytosis in endothelial cells of blood vessels in the cat myocardium (panels A,B,C and H), and from the choroid rete of the bowfin fish eye. Both types of cell...

Stages of coated pit vesicle invagination during micropinocytosis. Each frame is a portion of the surface of polychromatophilic erythroblasts from guinea pig bone marrow and various stages of vesicle...

Didinium captures Paramecium. Paramecium is almost completely ingested and the proboscis is beginning to reform. This micrograph was taken in 1968 by G. Antipa on a Cambridge Mark IIA operating at 20k...

Didinium captures Paramecium. At midingestion and showing metachronous waves of cilia within the two characteristic ciliary girdles of Didinium nasutum. This micrograph was taken in 1968 by G. Antipa ...

Didinium captures Paramecium. After reeling in the prey with cyclosis tugging at the attached toxicysts the proboscis opens to engage the Paramecium. This micrograph was taken in 1968 by G. Antipa on ...

Uptake of yolk protein into coated vesicles (arrows) at the periphery of oocytes of the cockroach Periplaneta americana. Yolk protein binds to regions of the membrane with a prominent glycocalyx. Beca...

Ema localizes to endosomes. Third instar larval garland cells expressing Ema-GFP fusion protein with endosomes labeled with a 5-min pulse of the fluid-phase endocytic tracer avidin-Cy3 followed by an ...

The ingestion of Paramecium by Didinium. This micrograph also clearly shows the five short rows of clavate cilia (ciliary stubs without central microtubules) that reside just below the anterior and po...