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

Erythrocytes: Hemoglobin

Anatomy & Physiology

17. The Blood

Erythrocytes: Hemoglobin

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Multiple Choice

Which organelle is absent in mature erythrocytes (red blood cells)?

Mitochondria

Ribosomes

Nucleus

Endoplasmic reticulum

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Verified step by step guidance

Understand the function of erythrocytes: Erythrocytes, or red blood cells, are primarily responsible for transporting oxygen from the lungs to the rest of the body and returning carbon dioxide from the body to the lungs.

Recognize the unique characteristics of mature erythrocytes: Mature erythrocytes are unique among cells in the human body because they lack certain organelles that are typically present in other cell types.

Identify the organelles typically found in cells: Common organelles include the nucleus, mitochondria, ribosomes, and the endoplasmic reticulum. Each of these has specific functions, such as the nucleus housing DNA, mitochondria producing energy, ribosomes synthesizing proteins, and the endoplasmic reticulum being involved in protein and lipid synthesis.

Determine which organelle is absent in mature erythrocytes: Mature erythrocytes are known to lack a nucleus, which is a key feature that allows them to have more space to carry hemoglobin, the protein that binds oxygen.

Conclude that the absence of a nucleus in mature erythrocytes is a distinguishing feature, as it allows them to efficiently perform their role in oxygen transport without the need for cellular division or protein synthesis.