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Medicine LibreTexts

15: Blood

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An Overview of Blood

Learning Objectives
  • Name the fluid component of blood and the three major types of formed elements, and identify their relative proportions in a blood sample

  • 15.1: Composition of Blood
    This page explains blood tests, particularly hematocrit, which measures the percentage of red blood cells (RBCs) in a blood sample after centrifugation. It details the composition of blood, including the buffy coat of white blood cells and platelets and plasma. Normal hematocrit values are 36-50%, with females averaging 41% and males 47%. Additionally, it notes the proportion of plasma, which makes up about 59% of blood volume in females and 53% in males.
  • 15.2: Exercises
    This page provides exercises on hematocrit and blood cell identification, including tasks such as identifying hematocrit components, matching substances to locations, and completing a transfusion compatibility table. It also involves preparing a blood slide for microscopy to accurately draw different blood cells (erythrocytes, thrombocytes, leukocytes), while documenting their magnification, epithelial type, tissue source, and functions.
  • 15.3: MODELS- Blood, Histology
    This page covers blood composition and histology, detailing components like plasma, buffy coat, red blood cells, white blood cells (both granulocytes and agranulocytes), and platelets. It emphasizes the significance of blood types and the associated antigens and antibodies in the ABO and Rh systems. Additionally, it highlights the necessity of understanding safe practices for blood donation and transfusion between different types.


This page titled 15: Blood is shared under a CC BY license and was authored, remixed, and/or curated by Lumen Learning.

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