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Identify the indicated LAYER in the spinal cord.

Identify the indicated LAYER in the spinal cord.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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**Question 1** Identify the indicated LAYER in the spinal cord. **Description of Diagram** The image shows a cross-sectional view of a spinal cord segment nested within a vertebral column. The focus is on the internal anatomy of the spinal cord, specifically highlighting its layers. 1. **Vertebrae Surrounding the Spinal Cord:** - The bony structure encasing the spinal cord, shown with outer extensions, represents the vertebra. - This provides a protective barrier for the softer tissue of the spinal cord inside. 2. **Spinal Cord Components:** - The spinal cord cross-section depicted in the center consists of gray and white matter. - The gray matter, shaped like a butterfly or an H, contains nerve cells and is where processing occurs. - The white matter, surrounding the gray matter, contains myelinated axons that transmit signals. 3. **Highlighted Area:** - A black arrow points to a specific area of the spinal cord. This is likely indicating one of the layers or parts such as the dorsal horn, ventral horn, or lateral horn, which are part of the gray matter. - In educational contexts, this part could refer to the function it plays in transmitting nerve signals or processing sensory/motor information. 4. **Additional Structures:** - The diagram includes labels for other anatomical features such as intervertebral discs, nerve roots, and blood vessels, which emphasize the complexity and connectivity of the spinal column. This cross-section is helpful for understanding the anatomical organization and function of the spinal cord within the context of its surrounding vertebral structure.
Transcribed Image Text:**Question 1** Identify the indicated LAYER in the spinal cord. **Description of Diagram** The image shows a cross-sectional view of a spinal cord segment nested within a vertebral column. The focus is on the internal anatomy of the spinal cord, specifically highlighting its layers. 1. **Vertebrae Surrounding the Spinal Cord:** - The bony structure encasing the spinal cord, shown with outer extensions, represents the vertebra. - This provides a protective barrier for the softer tissue of the spinal cord inside. 2. **Spinal Cord Components:** - The spinal cord cross-section depicted in the center consists of gray and white matter. - The gray matter, shaped like a butterfly or an H, contains nerve cells and is where processing occurs. - The white matter, surrounding the gray matter, contains myelinated axons that transmit signals. 3. **Highlighted Area:** - A black arrow points to a specific area of the spinal cord. This is likely indicating one of the layers or parts such as the dorsal horn, ventral horn, or lateral horn, which are part of the gray matter. - In educational contexts, this part could refer to the function it plays in transmitting nerve signals or processing sensory/motor information. 4. **Additional Structures:** - The diagram includes labels for other anatomical features such as intervertebral discs, nerve roots, and blood vessels, which emphasize the complexity and connectivity of the spinal column. This cross-section is helpful for understanding the anatomical organization and function of the spinal cord within the context of its surrounding vertebral structure.
### Meningeal Layers of the Central Nervous System This section provides a multiple-choice question about the different protective coverings of the brain and spinal cord, known as the meninges. **Options:** - **Pia Mater:** - The innermost layer of the meninges, which closely envelops the brain and spinal cord. - **Arachnoid Mater:** - The middle layer, situated between the pia mater and dura mater. It is named for its spider web-like appearance. - **Dura Mater:** - The outermost, tough, and fibrous layer that protects the brain and spinal cord. - **Subarachnoid Space:** - The space between the arachnoid mater and pia mater, filled with cerebrospinal fluid, which cushions the brain and spinal cord. This question is designed to test your understanding of the anatomical structure and protective functions of the meninges in the central nervous system.
Transcribed Image Text:### Meningeal Layers of the Central Nervous System This section provides a multiple-choice question about the different protective coverings of the brain and spinal cord, known as the meninges. **Options:** - **Pia Mater:** - The innermost layer of the meninges, which closely envelops the brain and spinal cord. - **Arachnoid Mater:** - The middle layer, situated between the pia mater and dura mater. It is named for its spider web-like appearance. - **Dura Mater:** - The outermost, tough, and fibrous layer that protects the brain and spinal cord. - **Subarachnoid Space:** - The space between the arachnoid mater and pia mater, filled with cerebrospinal fluid, which cushions the brain and spinal cord. This question is designed to test your understanding of the anatomical structure and protective functions of the meninges in the central nervous system.
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