Temperature and pressure are basic factors in physical and chemical processes, but it is only recently that biologists have considered the role of pressure in the physical and chemical processes ...

Plant cells use vacuoles to adjust their size and turgor pressure. Vacuoles usually account for changes in cell size when the cytoplasmic volume stays constant. Some vacuoles have specialized ...

Human bodies defend themselves using a diverse population of immune cells that circulate from one organ to another, ...