You only need the English Proficient for international operations as it's an ICAO thing. Some countries, like France, check; others may not. Similar on the RRTO -- some countries, like Canada and the Bahamas don't require it, but others, like Turks & Caicos, do require it and do check it.
Apoptosis: A form of cell death in which a programmed sequence of events leads to the elimination of cells without releasing harmful substances into the surrounding area. Apoptosis plays a crucial role in developing and maintaining the health of the body by eliminating old cells, unnecessary cells, and unhealthy cells.
Phagocytosis is the process of a cell eating. It is one type of endocytosis. Endocytosis happens when a cell goes out and takes in something. Phagocytosis is the situation when it gets a solid. Pinocytosis is the act of grabbing some liquid. The whole cell works during the process.