Blast

Blast

Blast (/blæst/), from the Old English blǣst meaning a gust of wind, is a term used in various medical contexts.

Definition

In medical terminology, a blast often refers to an immature cell, such as a blood cell precursor or a blastocyst in embryology.

Usage in Hematology

In hematology, a blast is an immature precursor cell. For example, a myeloblast is a precursor cell for myeloid cells, which include neutrophils, eosinophils, basophils, and monocytes. Similarly, a lymphoblast is a precursor cell for lymphoid cells, which include T cells, B cells, and natural killer cells.

Usage in Embryology

In embryology, a blast is used to denote a type of cell or stage of development. For example, a blastocyst is an early stage in mammalian embryogenesis, while a blastula is an early stage in the embryogenesis of many other animals.

Related Terms

• Blastocyst
• Blastula
• Blastogenesis
• Blastomere
• Blast injury
• Blast phase

See Also

• Cell
• Hematopoiesis
• Embryogenesis

External links

• Medical encyclopedia article on Blast
• Wikipedia's article - Blast

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