Nursing Assessment: Hematologic Function

Nursing Assessment: Hematologic Function Copyright © 2019 Wolters Kluwer · All Rights Reserved The Hematologic System Blood and the sites where blood is produced, including the bone marrow and the reticuloendothelial system (RES). Blood is composed of plasma and various types of cells: o Approximately 55% of blood volume is plasma, and 45% consists of various cellular components. Copyright © 2019 Wolters Kluwer · All Rights Reserved Blood Three primary cell types: o Erythrocytes o Leukocytes o Thrombocytes Hematopoiesis Copyright © 2019 Wolters Kluwer · All Rights Reserved Bone Marrow Primary site of hematopoiesis Extramedullary v. intramedullary Red marrow v. yellow marrow Myeloid cells Lymphoid cells Copyright © 2019 Wolters Kluwer · All Rights Reserved Differentiation of Stem Cells Copyright © 2019 Wolters Kluwer · All Rights Reserved Erythrocytes (Red Blood Cells) Mature erythrocytes consist primarily of hemoglobin, which contains iron and makes up 95% of the cell mass. Oxygen readily binds to hemoglobin in the lungs and is carried as oxyhemoglobin in arterial blood. __________ are immature erythrocytes