Marrow
Marrow
Marrow (/ˈmæroʊ/) is a type of tissue found within the hollow interior of bones. In adults, marrow in large bones produces new blood cells. Marrow is also a key component of the lymphatic system, playing a vital role in the body's immune response.
Etymology
The term "marrow" comes from the Old English word "mearg", which is related to the Old High German "marag", meaning "marrow". The term has been in use since before the 12th century.
Types of Marrow
There are two types of marrow: red marrow (Red marrow) and yellow marrow (Yellow marrow). Red marrow is responsible for producing red blood cells, white blood cells, and platelets. Yellow marrow, on the other hand, stores fats.
Red Marrow
Red marrow, also known as myeloid tissue, is found in the bone cavities. It is responsible for producing red blood cells (Erythrocytes), white blood cells (Leukocytes), and platelets (Thrombocytes).
Yellow Marrow
Yellow marrow is found in the medullary cavity, the hollow interior of the middle portion of long bones. This type of marrow stores fats (Adipocytes) that can be converted into energy as needed.
Related Terms
- Bone: The hard, rigid form of connective tissue constituting most of the skeleton of vertebrates.
- Hematopoiesis: The process of creating new blood cells in the body.
- Stem cell: A cell with the unique ability to develop into specialised cell types in the body.
See Also
- Osteology: The study of the structure and function of the skeleton and bony structures.
- Hematology: The branch of medicine concerned with the study of the cause, prognosis, treatment, and prevention of diseases related to blood.
External links
- Medical encyclopedia article on Marrow
- Wikipedia's article - Marrow
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