Blood Composition and Functions

From the study guide

Course Outline

  1. Blood Composition
  2. Plasma Components
  3. Formed Elements
  4. Blood Functions
  5. Transportation Roles
  6. Regulatory Functions
  7. Protective Functions
  8. Hematopoiesis Process
  9. Blood Cell Sites
  10. Erythropoiesis Regulation
  11. Red Blood Cell Disorders
  12. White Blood Cell Types

1. Blood Composition

Key Concepts & Definitions

  • Plasma: The liquid, straw-colored component of blood, comprising about 55% of blood volume, containing water, proteins, electrolytes, nutrients, hormones, and waste products.
  • Formed Elements: The cellular components of blood, including red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes).
  • Erythrocytes (Red Blood Cells): Biconcave, anucleate cells responsible for oxygen and carbon dioxide transport via hemoglobin.
  • Leukocytes (White Blood Cells): Cells involved in immune defense, classified into granulocytes (neutrophils, eosinophils, basophils) and agranulocytes (lymphocytes, monocytes).
  • Platelets (Thrombocytes): Small cell fragments that facilitate blood clotting and wound healing.
  • Hemoglobin: The iron-containing protein in erythrocytes that binds oxygen for transport.

Essential Points

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Practice quiz preview

1. What is blood primarily composed of?

2. Which plasma protein is primarily responsible for maintaining blood osmotic pressure?

3. What is the primary role of formed elements in blood?

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Flashcard preview

Blood composition — components?

Plasma and formed elements.

Plasma — main proteins?

Albumin, globulins, fibrinogen.

Erythropoiesis — stimulated by?

Erythropoietin from kidneys.

Blood — main components?

Plasma and formed elements.

Plasma — percentage of blood volume?

About 55% of blood.

Erythrocytes — function?

Transport oxygen and carbon dioxide.

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Frequently asked questions

What does the Blood Composition and Functions study guide cover?

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The practice quiz has 10 multiple-choice questions, each with an explanation. Use it to check what you know and find your gaps.

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