Bone marrow

Definition

Bone marrow is a spongy tissue found inside certain bones, such as the hip and thigh bones. It is crucial for the production of blood cells, including those vital for the immune system.

5 Must Know Facts For Your Next Test

1. Bone marrow produces B lymphocytes, which are essential for humoral immunity.
2. T lymphocytes mature in the thymus after originating from bone marrow.
3. Bone marrow contains hematopoietic stem cells that can differentiate into various types of blood cells.
4. Red bone marrow is actively involved in hematopoiesis, while yellow bone marrow primarily stores fat.
5. In adaptive immunity, bone marrow-derived cells play a key role in recognizing and responding to specific pathogens.

Review Questions

• What types of immune cells are produced in the bone marrow?
• How does bone marrow contribute to both humoral and cellular immunity?
• What is the difference between red and yellow bone marrow regarding their functions?

Related terms

Hematopoiesis: The process of forming new blood cells in the body.

B Lymphocytes: A type of white blood cell that originates from the bone marrow and is involved in producing antibodies.

T Lymphocytes: A type of white blood cell that matures in the thymus and plays a central role in cellular immunity.