What does bone marrow do in the body?

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dano7744 | College Teacher | (Level 2) Educator

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Bone marrow is the organic material that fills the cavities of the inside/medial portion of the bones. It is a connective and hematopoietic tissue. Marrow helps form or synthesize blood cells. Hematopoiesis is the process of blood cell formation which occurs in red bone marrow. The five types of bones are long bones (example, humerus), short bones (wrist, carpals), flat bones (frontal,forehead), irregular bones (vertebrae), and round bones or sesamoid (patella, kneecap). The epiphysis (proximal or distal ends) of long bones contain red bone marrow so this is where hematopoiesis occurs. The shaft of long bones (diaphysis) contains yellow bone marrow (in adults) and is a fatty, inactive form of marrow that also serves as a connective tissue.

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besure77 | Middle School Teacher | (Level 1) Senior Educator

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Bone marrow is very fatty and sponge like. It also contains stem cells, which are immature cells. When these cells mature, they become the red blood cells, white blood cells, and platelets (whichever is needed). They also form other types of cells as well. Bone marrow is found in the larger bones such as in the pelvis and femur and it is very important because it keeps our bodies healthy and strong. Bone marrow transplants are often being performed on people who are lacking healthy bone marrow due to diseases such as cancer.

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kapokkid | High School Teacher | (Level 1) Educator Emeritus

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Bone marrow has several functions, part of it depends on what type of bone the marrow is in or the type of marrow itself.  Red marrow produces many kinds of blood cells including white and red blood cells as well as platelets, basically every main ingredient in blood.

Yellow marrow consists of fatty cells and begins to be present more and more as a person ages as almost all bone marrow is red at a young age. Yellow marrow can also be converted back to red if necessary.

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sid-sarfraz | Student, Graduate | (Level 2) Salutatorian

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Bone marrow is present in our strong n large bones like femur. It is basically spongy tissues present in the bones. It contains stem cells that help in production of red blood cells, white blood cells and platelets, while plasma is the one carrying these all three. The main function of bone marrow is to produce blood cells.

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parama9000 | Student, Grade 11 | (Level 1) Valedictorian

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The bone marrow is a sponge-like structure which forms blood cells.

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taangerine | Student, Grade 12 | (Level 1) Valedictorian

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Bone marrow produces white blood cells (leukocytes), red blood cells (erythrocytes), and platelets (thrombocytes). 

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ik9744 | Student, Grade 9 | (Level 1) Valedictorian

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Bone marrow produces blood cells like white and red. 

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jess1999 | Student, Grade 9 | (Level 1) Valedictorian

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Bone marrows are spongy tissues in our bones. Bone marrow produces blood cells (red blood cells), platelets, and white blood cells. Red blood cells carries oxygen and is able to get rid of carbon dioxide. Platelets can help the blood "stick together" which stops bleeding at sites where a cut is at. Lastly, white blood cells can help us fight off infections.

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