Why is easy bruising so common in older adults? Most bruises form when small blood vessels (capillaries) near the skin's surface are broken by the impact of a blow or injury â often on the arms or legs. When this happens, blood leaks out of the vessels and initially appears as a black-and-blue mark. Eventually your body reabsorbs the blood, and the mark disappears.
HeLa cell. HeLa cell, a cancerous cell belonging to a strain continuously cultured since its isolation in 1951 from a patient suffering from cervical carcinoma. The designation HeLa is derived from the name of the patient, Henrietta Lacks.
DNA fingerprinting is a reliable method for identifying people. How DNA fingerprinting works as to do with something called the HLA system (human leukocyte antigen system).The HLA is a system that codes for proteins on the surfaces of many cells, including white blood cells. HLA genotyping is used in transplants.NA fingerprinting is a reliable method for identifying people. How DNA fingerprinting works as to do with something called the HLA system (human leukocyte antigen system).