We now turn to the vital process by which information in DNA is used by the cell to direct the synthesis of RNAs and proteins. The various cell types in a multicellular organisms owe their distinctive phenotypes to differences in the proteins made in each kind of cell.
There is a wide array of conditions that can cause hemarthrosis including: trauma - a blunt injury or fracture of a joint can cause bleeding into it. A twisting injury or blow to the knee can also cause hemarthrosis and rapid swelling. In some cases, minimal knee trauma results in hemarthrosis, often due to underlying clotting or collagen disorders.
1 Pericardial effusion is a collection of fluid in the pericardial sac. This fluid may be produced by inflammation.  The cause of pericarditis in most individuals is unknown but is likely due to viral infection. Pericarditis may be an associated complication of many diseases or may be due to trauma.