Multiple Choice
How many pairs of spinal nerves are there in the human body?
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7. The Skeletal System
The Spine
Problem 9
Textbook Question
Transverse foramina are a characteristic of which kind of vertebra?
a. Thoracic
b. Lumbar
c. Sacral
d. Cervical
Verified step by step guidance1
Understand the anatomy of the vertebrae: The vertebral column is divided into different regions—cervical, thoracic, lumbar, sacral, and coccygeal. Each region has unique characteristics that distinguish its vertebrae.
Learn about transverse foramina: Transverse foramina are openings found in the transverse processes of certain vertebrae. These foramina allow the passage of the vertebral arteries, veins, and associated nerves.
Identify the vertebrae with transverse foramina: Transverse foramina are a defining feature of cervical vertebrae. These foramina are present in all cervical vertebrae except for the seventh (C7), where they may be smaller or absent.
Eliminate other options: Thoracic vertebrae are characterized by facets for rib articulation, lumbar vertebrae are large and robust to support weight, and sacral vertebrae are fused to form the sacrum. None of these have transverse foramina.
Conclude that the correct answer is cervical vertebrae, as they are the only type of vertebrae with transverse foramina.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Transverse Foramina
Transverse foramina are small openings located in the transverse processes of certain vertebrae. They serve as passageways for the vertebral arteries and veins, which supply blood to the brain. This anatomical feature is primarily found in cervical vertebrae, distinguishing them from other types of vertebrae.
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Cervical Vertebrae
Cervical vertebrae are the seven vertebrae located in the neck region of the spine, labeled C1 to C7. They are characterized by their smaller size and unique features, such as the presence of transverse foramina. These vertebrae support the head and allow for a wide range of motion, including rotation and flexion.
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Vertebral Column Anatomy
The vertebral column, or spine, is composed of 33 vertebrae divided into five regions: cervical, thoracic, lumbar, sacral, and coccygeal. Each region has distinct characteristics and functions, with cervical vertebrae being specialized for mobility and protection of the spinal cord. Understanding the anatomy of the vertebral column is essential for identifying the specific features of different vertebrae.
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