Lymph nodes are very small clusters of immune cells that function as part of the bodyâs immune system. There are more than 600 lymph nodes throughout the body, but the ones most frequently enlarged or swollen are the lymph nodes in the neck, under the chin, in the armpits, and in the groin.here are more than 600 lymph nodes throughout the body, but the ones most frequently enlarged or swollen are the lymph nodes in the neck, under the chin, in the armpits, and in the groin.
Uses of sulfuric acid. By far the largest amount of sulfuric acid is used to make phosphoric acid, used, in turn, to make the phosphate fertilizers, calcium dihydrogenphosphate and the ammonium phosphates. It is also used to make ammonium sulfate, which is a particularly important fertilizer in sulfur-deficient.
Muriatic acid, or hydrochloric acid, is used in swimming pools to lower the pH and total alkalinity of the pool water.Although muriatic acid is a hazardous material, when used correctly, it can be safe to use in swimming pools.uriatic acid, or hydrochloric acid, is used in swimming pools to lower the pH and total alkalinity of the pool water.