Bone marrow is a semi-solid tissue found within the spongy or cancellous portions of bones. In birds and mammals, bone marrow is the primary site of new blood cell production or haematopoiesis. It is composed of hematopoietic cells, marrow adipose tissue, and supportive stromal cells. In adult humans, bone marrow is primarily located in the ribs, vertebrae, sternum, and bones of the pelvis. Bone marrow comprises approximately 5% of total body mass in healthy adult humans, such that a man weighing 73 kg (161 lbs) will have around 3.65 kg (8 lbs) of bone marrow. Human marrow produces approximately 500 billion blood cells per day, which join the systemic circulation via permeable vasculature sinusoids within the medullary cavity. All types of hematopoietic cells, including both myeloid and lymphoid lineages, are created in bone marrow; however, lymphoid cells must migrate to other lymphoid organs (e.g. thymus) in order to complete maturation. Bone marrow transplants can be conducted to ...
India Republic Day -- On Indias 70th Republic Moment Saturday the annual celebration in the national capital exhibited the countrys rich ethnic heritage and traditions. Typically the central theme of the tableaux displayed was Mahatma Gandhi as 2019 marks all four of his 150th labor and birth anniversary. The might from the Indian military was in full display and in certain womens power. Before the celebration celebrations kicked off using Prime Minister Narendra Modi paying homage to the martyrs by laying a flower wreath at Amar Jawan Jyoti. At Rajpath the Prime Minister received President Ram memory Nath Kovind and South Africas President Cyril Ramaphosa who was the Chief Guest at Indias Republic Day 2019 event. President Kovind hoisted the tricolour as the nationwide anthem played and a 21-gun salute was fired by seven cannons of 2281 Field Regiment. Republic Moment Parade 2019 * Assam Rifles tableau: Participating in the particular Republic Day parade the first time in history...
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