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

1. Introduction to Anatomy & Physiology

Introduction to Organ Systems

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Introduction to Organ Systems

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Multiple Choice

The openings of which vessels are visible in the left atrium?

Pulmonary veins

Coronary arteries

Superior vena cava

Aorta

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Verified step by step guidance

Understand the anatomy of the heart: The left atrium is one of the four chambers of the heart, and its primary function is to receive oxygenated blood from the lungs via the pulmonary veins.

Identify the vessels associated with the left atrium: The pulmonary veins are the only vessels that open into the left atrium, as they transport oxygen-rich blood from the lungs to the heart.

Clarify the role of other vessels mentioned: The coronary arteries supply blood to the heart muscle itself, but they do not open into the left atrium. The superior vena cava carries deoxygenated blood to the right atrium, not the left atrium. The aorta is the main artery that carries blood away from the left ventricle, not the left atrium.

Eliminate incorrect options: Based on anatomical knowledge, the coronary arteries, superior vena cava, and aorta do not open into the left atrium. Only the pulmonary veins are visible in the left atrium.

Conclude the correct answer: The openings of the pulmonary veins are visible in the left atrium, as they are the vessels responsible for delivering oxygenated blood from the lungs to this chamber.