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.
HeLa Cells and Chromosome Spreads. CellServ produces a kit that will allow students to use HeLa cells in the lab to observe cells and chromosomes under the microscope. Students are given microtubules containing HeLa cells that have been fixed in solution prior to metaphase in mitosis. Students use pipettes to drop the cell solution onto clean microscope slides and then stain the slides with stain that is included in the kit.