The immune system is a system of many biological structures and processes within an organism that protects against disease. To function properly, an immune system must detect a wide variety of agents, known as pathogens, from viruses to parasitic worms, and distinguish them from the organism's own healthy tissue.nflammation is one of the first responses of the immune system to infection. The symptoms of inflammation are redness, swelling, heat, and pain, which are caused by increased blood flow into tissue. Inflammation is produced by eicosanoids and cytokines, which are released by injured or infected cells.
Converting PST to EST. This time zone converter lets you visually and very quickly convert PST to EST and vice-versa. Simply mouse over the colored hour-tiles and glance at the hours selected by the column... and done! PST stands for Pacific Standard Time. EST is known as Eastern Standard Time. EST is 3 hours ahead of PST.
94,009 Contributions. Eastern Time is 3 hours ahead of Pacific Time. The mainland U.S. has four time zones (Alaska and Hawaii each have their own time zones, which makes a total of 6 different timeâ¦ zones for the U.S.). From west to east, the mainland U.S.'s time zones are: Pacific Time, Mountain Time, Central Time and Eastern Time.