Hematopoiesis

Definition

Hematopoiesis is the process by which all blood cells are produced from hematopoietic stem cells in the bone marrow. It is essential for maintaining the body's immune and circulatory systems.

5 Must Know Facts For Your Next Test

1. Hematopoiesis occurs primarily in the bone marrow in adults.
2. The process starts with multipotent hematopoietic stem cells that differentiate into various types of blood cells, including red blood cells, white blood cells, and platelets.
3. Cytokines and growth factors play crucial roles in regulating hematopoiesis.
4. During an infection, the production of certain white blood cells can be increased to enhance the immune response.
5. Innate immune cells like neutrophils, macrophages, and dendritic cells are products of hematopoiesis.

Review Questions

• Where does hematopoiesis primarily occur in adults?
• Which types of blood cells are produced through hematopoiesis?
• How do cytokines influence the process of hematopoiesis?

Related terms

Cytokine: Small proteins that act as signaling molecules in the immune system.

Bone Marrow: The soft tissue inside bones where hematopoiesis takes place.

Multipotent Stem Cells: Stem cells capable of differentiating into multiple cell types within a specific lineage.