Answer:
bone marrow
Step-by-step explanation:
Bone marrow are specialized highly vascular fibrous tissues found within the spongy or cancellous parts of the bone. They compose hematopoietic cells which give rise to platelets, leukocytes and erythrocytes. The stem cells are pluripotent meaning they can self- Renewal reproducing another cell identical to themselves and have limited differentiation meaning they can generate one or more subsets of more mature cells but cannot form extra-embryonic tissues.