A plant or animal that lives, grows and feeds on or within another living organism. Immunity resulting from the transfer of antibodies or antiserum produced by another individual. Platelets also contribute to the immune response. Short for polymorphonuclear leukocytes or granulocytes. Organic compounds made up of amino acids.
Proteins are one of the major constituents of plant and animal cells.
A nucleic acid that is found in the cytoplasm and also in the nucleus of some cells. One function of RNA is to direct the synthesis of proteins. Any of a diverse group of cells that have the capacity to engulf and destroy foreign material, dead tissues, or other cells. A laboratory animal that, lacking an enzyme necessary to fashion an immune system of its own, can be turned into a model of the human immune system when injected with human cells or tissues. The clear liquid that separates from the blood when it is allowed to clot.