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

19. The Blood Vessels

Introduction to Blood Vessels

Anatomy & Physiology

19. The Blood Vessels

Introduction to Blood Vessels

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Multiple Choice

Which artery travels under the left auricle and then divides into the circumflex and anterior interventricular branches?

Left coronary artery

Right coronary artery

Aorta

Pulmonary artery

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Verified step by step guidance

Step 1: Begin by identifying the anatomical location described in the problem. The left auricle is part of the left atrium of the heart, which is located on the superior aspect of the heart.

Step 2: Understand the branching pattern of the coronary arteries. The coronary arteries are responsible for supplying oxygenated blood to the heart muscle. The left coronary artery typically divides into two main branches: the circumflex artery and the anterior interventricular artery (also known as the left anterior descending artery).

Step 3: Compare the options provided in the question. The left coronary artery is the artery that travels under the left auricle and divides into the circumflex and anterior interventricular branches. The right coronary artery supplies the right side of the heart and does not divide into these branches. The aorta is the main artery leaving the heart but does not directly supply the heart muscle. The pulmonary artery carries deoxygenated blood to the lungs and is unrelated to coronary circulation.

Step 4: Recall the function and anatomical pathway of the left coronary artery. It originates from the left side of the aorta and travels under the left auricle before dividing into its branches, which supply the left side of the heart and the interventricular septum.

Step 5: Confirm your understanding by visualizing or referencing a diagram of the coronary circulation. This will help reinforce the anatomical relationship between the left coronary artery, its branches, and the left auricle.