Table of contents

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1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

17. The Blood

Introduction To Blood

Anatomy & Physiology

17. The Blood

Introduction To Blood

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Multiple Choice

What is hematocrit a measure of?

The total volume of blood in the body

The number of white blood cells in blood

The concentration of hemoglobin in blood

The percentage of red blood cells in blood

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Verified step by step guidance

Understand the term 'hematocrit': Hematocrit is a measure used in medicine to determine the proportion of blood volume that is occupied by red blood cells.

Recognize the components of blood: Blood is composed of plasma, red blood cells, white blood cells, and platelets. Hematocrit specifically refers to the red blood cells component.

Identify the purpose of measuring hematocrit: It helps assess the oxygen-carrying capacity of blood, as red blood cells contain hemoglobin, which transports oxygen.

Learn how hematocrit is measured: A blood sample is centrifuged to separate its components, and the volume of red blood cells is compared to the total blood volume.

Clarify the correct answer: Hematocrit is the percentage of red blood cells in blood, not the total volume of blood, the number of white blood cells, or the concentration of hemoglobin.