The Holocene /ËhÉlÉµsiËn/ is the geological epoch that began after the Pleistocene at approximately 11,700 years BP and continues to the present. The Holocene is part of the Quaternary period. Its name comes from the Greek words á½Î»Î¿Ï (holos, whole or entire) and ÎºÎ±Î¹Î½ÏÏ (kainos, new), meaning entirely recent. It has been identified with the current warm period, known as MIS 1, and can be considered an interglacial in the current ice age based on that evidence.
Overview. The lymphatic system has the responsibility of keeping you alive and healthy. The spleen, which is in the upper left abdominal area, is one of the organs in this system. The spleen of an adult holds the largest amount of lymphoid tissue. An adult spleen is about 5 inches long and weighs approximately 4 oz.
There two main types of tissue in the spleen are specialised for its two main functions: White pulp contains lymphoid aggregations, mostly lymphocytes, and macrophages which are arranged around the arteries. The lymphocytes are both T (mainly T-helper) and B-cells.he spleen is the largest mass of lymphatic tissue in the bod, and is found between stomach and diaphragm. Like the lymph nodes, it also has a hilus (hilium) which is where the major blood vessels enter and leave.