What is bone marrow: Bone marrow

Bone marrow , soft, gelatinous tissue that fills the cavities of the bones. Bone marrow is either red or yellow, depending upon the preponderance of hematopoietic (red) or fatty (yellow) tissue. In humans the red bone marrow forms all of the blood cells with the exception of the lymphocytes, which Bone marrow is a semi-solid tissue found within the spongy (also known as cancellous) portions of bones. [2] In birds and mammals, bone marrow is the primary site of new blood cell production (or haematopoiesis). [3] 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. [4] Bone marrow comprises approximately 5% of total body mass in healthy adult ... Bone marrow is the soft tissue found within the cavities of bones that produces various types of blood cells, including red blood cells, white blood cells, Bone marrow is a soft, gelatinous tissue inside some bones. This article covers bone marrow in detail, including what happens if it does not function correctly.