Definition

Noun: A hematopoietic stem cell is a type of unspecialized cell found primarily in the bone marrow. It has the unique ability to develop into all the different types of blood cells in the body, including red blood cells, white blood cells, and platelets. These stem cells are the foundation for the continuous renewal of the blood and immune system.

Usage

The term is used in biological, medical, and research contexts to refer to the origin cells of the blood system. - Hematopoietic stem cell is a scientific term. It is often used in its full form in formal writing but may be abbreviated as HSC after being introduced. - It functions as a countable noun (e.g., a hematopoietic stem cell, hematopoietic stem cells).

Examples

• In a sentence as a subject:
  • The hematopoietic stem cell is capable of self-renewal and differentiation.
• In a sentence as an object:
  • Doctors transplanted healthy hematopoietic stem cells into the patient's bone marrow.
• In a descriptive context:
  • Research focuses on isolating and characterizing the hematopoietic stem cell.

Advanced Usage

• Hematopoietic stem cell transplantation (HSCT): A medical procedure where these cells are infused into a patient to restore blood cell production, commonly used to treat certain cancers and blood disorders.
  • He underwent an allogeneic hematopoietic stem cell transplantation.
• Hematopoietic stem cell niche: Refers to the specific microenvironment in the bone marrow that regulates the stem cell's behavior.
  • The study examined factors within the hematopoietic stem cell niche.

Variants and Related Words

• HSC: The standard abbreviation for hematopoietic stem cell.
• Hemopoietic stem cell: An alternate, less common spelling for . The meaning is identical.
• Stem cell: The broader category of undifferentiated cells to which hematopoietic stem cells belong.
• Progenitor cell: A more committed cell type that arises from a stem cell and has a more limited range of differentiation.

Synonyms

• Blood stem cell: A more general, descriptive synonym.
• Bone marrow stem cell: A synonym that specifies the primary location, though note that some hematopoietic stem cells can also be found in umbilical cord blood and the bloodstream.

Notes on Meaning

The core, singular meaning of hematopoietic stem cell is the pluripotent stem cell that gives rise to the entire hematopoietic (blood-forming) system. It does not refer to stem cells that form other tissues like muscle or nerve. The definition's reference to T cells and B cells highlights a key function: generating the lymphocytes essential for the adaptive immune response.

Noun

1. blood forming stem cells in the bone marrow; T cells and B cells arise from these stem cells