Multiple Choice
Which directional term best describes the position of the heart relative to the lungs?
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1. Introduction to Anatomy & Physiology
Introduction to Directional Terms
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Intercostal spaces are numbered based on which anatomical structures?
A
The vertebrae adjacent to each space
B
The rib inferior to each space
C
The costal cartilage of each rib
D
The rib superior to each space
Verified step by step guidance1
Understand the anatomy of the thoracic cage, which consists of ribs, vertebrae, and intercostal spaces. Intercostal spaces are the gaps between adjacent ribs, filled with muscles, nerves, and blood vessels.
Recognize that ribs are numbered sequentially from superior to inferior, starting with the first rib at the top of the thoracic cage.
Learn that intercostal spaces are named based on the rib located directly superior to the space. For example, the first intercostal space is located below the first rib and above the second rib.
Clarify that the numbering of intercostal spaces does not depend on the vertebrae adjacent to the space or the rib inferior to the space. It is strictly based on the rib superior to the space.
Conclude that the correct answer is 'The rib superior to each space,' as this is the anatomical convention for naming intercostal spaces.
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