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The joint between the parietal bones and the occipital bone is an example of a fibrous joint condyle synchondrosis synovial joint none of the above

The joint between the parietal bones and the occipital bone is an example of a fibrous joint condyle synchondrosis synovial joint none of the above

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:** The joint between the parietal bones and the occipital bone is an example of a: **Options:** - ○ fibrous joint - ○ condyle - ○ synchondrosis - ○ synovial joint - ○ none of the above
Transcribed Image Text:**Question:** The joint between the parietal bones and the occipital bone is an example of a: **Options:** - ○ fibrous joint - ○ condyle - ○ synchondrosis - ○ synovial joint - ○ none of the above
### Case Study: Growth Concerns Following Humerus Fracture in Adolescents #### Description A 15-year-old patient named Ralph sustained a fracture at the anatomical neck of the humerus. The surgeon expressed concern about the potential impact on the growth of the bone because the fracture extended through the epiphyseal cartilage. #### Options for Concern: 1. **The humerus has a poor blood supply.** 2. **This is the growing end of the bone.** 3. **He was a worry wart by nature.** 4. **The humerus ossifies in membrane.** ### Explanation: The concern primarily lies in the fact that the fracture occurred through the epiphyseal cartilage. The epiphyseal cartilage, also known as the growth plate, is critical for the longitudinal growth of the bone during adolescence. An injury to this area can potentially disrupt normal bone growth, leading to various complications such as limb length discrepancies and angular deformities. ### Detailed Exploration: 1. **Humerus Blood Supply**: - While the blood supply is crucial for bone healing, the primary issue in this case is not about the general blood supply but the specific disruption to the growth plate. 2. **Growth End of the Bone**: - The anatomical neck of the humerus is part of the growing end of the bone, meaning any injury here can directly affect the growth plate and subsequently, the bone's development. 3. **Worries by Nature**: - This is a less relevant option, likely inserted humorously, highlighting the importance of understanding medical specifics rather than personality traits. 4. **Ossification in Membrane**: - The humerus, like most long bones, ossifies through endochondral ossification (from cartilage), not membrane ossification. Therefore, this option is not applicable to the concern raised by the surgeon. Understanding the precise nature of the injury and the potential implications for growth is pivotal in the management and treatment of fractures in adolescents. #### Conclusion: The surgeon's concern is valid primarily because the fracture affects the growing end of the bone, particularly the epiphyseal cartilage. This highlights the importance of careful assessment and possibly corrective measures to ensure proper bone growth and development post-injury.
Transcribed Image Text:### Case Study: Growth Concerns Following Humerus Fracture in Adolescents #### Description A 15-year-old patient named Ralph sustained a fracture at the anatomical neck of the humerus. The surgeon expressed concern about the potential impact on the growth of the bone because the fracture extended through the epiphyseal cartilage. #### Options for Concern: 1. **The humerus has a poor blood supply.** 2. **This is the growing end of the bone.** 3. **He was a worry wart by nature.** 4. **The humerus ossifies in membrane.** ### Explanation: The concern primarily lies in the fact that the fracture occurred through the epiphyseal cartilage. The epiphyseal cartilage, also known as the growth plate, is critical for the longitudinal growth of the bone during adolescence. An injury to this area can potentially disrupt normal bone growth, leading to various complications such as limb length discrepancies and angular deformities. ### Detailed Exploration: 1. **Humerus Blood Supply**: - While the blood supply is crucial for bone healing, the primary issue in this case is not about the general blood supply but the specific disruption to the growth plate. 2. **Growth End of the Bone**: - The anatomical neck of the humerus is part of the growing end of the bone, meaning any injury here can directly affect the growth plate and subsequently, the bone's development. 3. **Worries by Nature**: - This is a less relevant option, likely inserted humorously, highlighting the importance of understanding medical specifics rather than personality traits. 4. **Ossification in Membrane**: - The humerus, like most long bones, ossifies through endochondral ossification (from cartilage), not membrane ossification. Therefore, this option is not applicable to the concern raised by the surgeon. Understanding the precise nature of the injury and the potential implications for growth is pivotal in the management and treatment of fractures in adolescents. #### Conclusion: The surgeon's concern is valid primarily because the fracture affects the growing end of the bone, particularly the epiphyseal cartilage. This highlights the importance of careful assessment and possibly corrective measures to ensure proper bone growth and development post-injury.
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