The term glomerulonephritis (GN) covers a group of conditions in which there is injury in the glomerulus, the filtering unit of the kidney. This can occur either as a primary glomerular disease, or secondary to drugs, infections or tumours (see Secondary Glomerular Disease, pp 464â466 of this issue).
As insects are spiders' main prey, it is likely that they would impose strong selectional forces on the foraging behavior of spiders. Most commonly found in the sheet-web spider families, some webs will have loose, irregular tangles of silk above them.
Their usual food is insects and other spiders but some of the larger species have been seen to eat other small animals such as millipedes, wood lice (slaters), and even small lizards, frogs, and birds.ut one kind of food that spiders normally do not eat is plant material. The reason for this is that they have to liquify their food before they can ingest it and are no more able to digest the cellulose of plants than we are.