Reticulocyte

Definition

A reticulocyte is an immature red blood cell (erythrocyte) that has just been released from the bone marrow into the bloodstream. These cells still contain remnants of ribosomal RNA, which are lost as they mature into fully functional erythrocytes.

Related terms

Erythropoiesis:

The process by which new red blood cells are produced in the bone marrow.

Hemoglobin:

A protein found in red blood cells responsible for transporting oxygen throughout the body.

Bone marrow: A spongy tissue inside bones where blood cells, including erythrocytes, are produced