5: Blood Anatomy, Blood Grouping, and Hematocrit Analysis

Integrated Human Anatomy and Physiology Lab Manual II: Neural and Cardiopulmonary Systems · LibreTexts

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    From LibreTexts, under CC BY 4.0, as the source states it; its equations are written in TeX, which the PDF shows typeset. This page at LibreTexts.

    Introduction

    In this lab, we will explore the fascinating world of blood anatomy, blood grouping, and hematocrit analysis. Blood is a vital component of the cardiovascular system, which serves to deliver oxygen and nutrients to tissues, remove wastes, distribute heat, and transport hormones and other essential chemicals to cells. It also serves to deliver immune system cells, antibodies, and other defense proteins to tissues. Erythrocytes (red blood cells), leukocytes (white blood cells), and thrombocytes (platelets) are suspended in the liquid matrix (plasma). Understanding blood is not just a scientific exercise; it has real-world implications for transfusions, organ transplants, and diagnosing various medical conditions.

    We will examine the microscopic structure of blood, identify different cell types, and learn about the significance of ABO and Rh blood groups and determine consequences of inappropriate blood transfusions. Additionally, we will determine hematocrit levels, gaining insight into red blood cell concentration and its clinical implications.

    Learning Objectives
    • Demonstrate skills preparing a blood smear slide.
    • Identify and characterize each type of formed element in a human blood smear, including RBCs, platelets, and the five types of white blood cells (neutrophils, lymphocytes, monocytes, eosinophils, and basophils).
    • Perform ABO and Rh blood typing on simulated (artificial) blood samples, applying theoretical knowledge to practical situations.
    • Define and measure hematocrit of blood samples and discuss the significance of values that fall outside the normal range, highlighting potential health implications.

    • 5.1: Background Information
      This page provides an overview of blood as a crucial connective tissue, comprising about 8% of body weight and varying by gender. It covers hematocrit, blood viscosity, common tests, and the roles of blood cells, including red blood cells, platelets, and leukocytes, with specific functions detailed for granulocytes and agranulocytes. Additionally, it emphasizes the significance of blood types and agglutinogens in transfusions and immune responses.
    • 5.2: Activity 1
      This page outlines the preparation of a peripheral blood smear, detailing necessary supplies, techniques, and criteria for assessing blood cell morphology. It describes the manual wedge method using EDTA-anticoagulated blood, air drying, and staining. Safety precautions are emphasized, treating specimens as potentially infectious per Cal/OSHA regulations.
    • 5.3: Activity 2
      This page covers the identification of white blood cells (WBCs) through microscopic images, focusing on their distinctive features like nuclear shape and cytoplasmic characteristics. It highlights the significance of these skills in understanding immune responses and diagnosing blood disorders. The content includes an activity on analyzing different WBC types and emphasizes the role of modern techniques, including machine learning, in improving the accuracy of WBC identification.
    • 5.4: Activity 3
      This page outlines a lab exercise for identifying white blood cells using a microscope with oil immersion at 1000x magnification. Participants rotate through three stations (A, B, C), each with different blood smear slides. The exercise aims to educate on microscope components and WBC identification. A printed lab version is necessary for full participation due to accessibility issues.
    • 5.5: Activity 4
      This page discusses the 2025 blood donation campaign themed "Give blood, give hope: together we save lives," emphasizing the impact of donors and community collaboration. It encourages participation through a slogan and tasks groups with creating unique themes and slogans that spotlight the significance of blood donation and its benefits for health and community, leading to presentations of their ideas.
    • 5.6: Activity 5
      This page highlights the significance of blood grouping and the process of determining blood types to avoid agglutination during transfusions. It explains blood type identification based on A and/or B antigens and the risks of incompatible transfusions. The page also details the use of a blood typing card with antibodies for quick identification and outlines a procedure for testing synthetic blood samples using anti-A, anti-B, and anti-Rh serums to ascertain ABO and Rh blood types.
    • 5.7: Activity 6
      This page discusses the challenges faced in understanding the ABO blood group system and antigen-antibody interactions during a Blood Typing Lab. It emphasizes the importance of blood typing in medical transfusions, the need for additional resources and peer support, and a significant realization about the consequences of incorrect blood transfusions on patient safety, showcasing the crucial role of blood compatibility.
    • 5.8: Activity 7
      This page discusses Packed Cell Volume (PCV), or hematocrit, as a measure of red blood cell percentage in blood. It details a lab activity for determining PCV using a centrifuge, emphasizing safety protocols due to infectious specimens. The procedure includes filling and sealing capillary tubes with blood, centrifuging them, and calculating hematocrit by measuring RBC height relative to total blood height. Post-lab discussions address health implications and result comparisons.
    • 5.9: Glossary
      This page outlines blood and hematology terminology, covering the classification and functions of blood cells, including erythrocytes and leukocytes. It addresses conditions such as anemia, leukemia, and hemophilia, and discusses processes like blood transfusion and coagulation. Additionally, it highlights the roles of antibodies, antigens, and hormones in blood health, emphasizing the importance of understanding these terms for studying blood disorders and their treatments.

    Thumbnail: Formed Elements of Blood. (CC BY-NC-SA 4.0; via An Overview of Blood).

    This page titled 5: Blood Anatomy, Blood Grouping, and Hematocrit Analysis was last modified on Fri, 27 Mar 2026 07:32:17 GMT and is shared under a CC BY 4.0 license and was authored, remixed, and/or curated by Lakshmikanta Sengupta and Susmita Sengupta.