Bone marrow is not composed of

The correct answer is Fibroblasts.Bone marrow refers to the tissue located in the hollow interior of long bones.It is composed of adipose tissue, areolar tissue, and blood cells.Bone marrow is mainly of two types – red and yellow.Red marrow is where red blood cells, platelets, and most white blood cells are formed and yellow marrow gives rise to some white blood cells.Adipose Tissue- Adipose tissue is a SPECIALIZED connective tissue that consists of adipocytes called lipid-rich cells.The main FUNCTION of adipose tissue is to STORE energy in the FORM of lipids, as it accounts for around 20-25% of total body weight in healthy individuals (fat).Areolar Tissue- Areolar connective tissue locks organs in place and connects other underlying tissues to epithelial tissue.For surrounding tissues, it often acts as a source of water and salts.Blood Cell- A blood cell, also called a hematopoietic cell, a hemocyte, or a hematocyte is a cell that is primarily located in the blood and formed by hematopoiesis.Major types of blood cellRed blood cells (erythrocytes).White blood cells (leukocytes).Platelets (THROMBOCYTES).