Table of contents

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

Which of the following is NOT considered a formed element of blood?

Leukocytes

Erythrocytes

Plasma

Platelets

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Verified step by step guidance

Step 1: Understand the term 'formed elements of blood.' Formed elements refer to the cellular components of blood, which include erythrocytes (red blood cells), leukocytes (white blood cells), and platelets (cell fragments). These are suspended in plasma, the liquid portion of blood.

Step 2: Recognize that plasma is not a formed element. Plasma is the extracellular matrix of blood and consists of water, proteins, nutrients, hormones, and waste products. It serves as the medium in which formed elements are transported.

Step 3: Compare the options provided in the question. Leukocytes, erythrocytes, and platelets are all cellular or cell-derived components, making them formed elements. Plasma, however, is a fluid and not a cellular component.

Step 4: Identify the correct answer based on the definition of formed elements. Since plasma is not a cellular component, it is not considered a formed element of blood.

Step 5: Conclude that the correct answer to the question is 'Plasma,' as it is the only option that does not fit the definition of formed elements.