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.
Granular leukocytes are multilobed nuclei containing leukocytes or white blood cells and are of three types. We shall discuss all about their types and functions in the following article. One of the most important cells of our immune system are the leukocytes or white blood cells (WBCs). These cells are free from hemoglobin and belong to the reticuloendothelial cell system. White blood cells are divided into two types, granular and agranular leukocytes.