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OMSB Radiology ( Radiology ) Practice Tests & Test Prep by Exam Edge

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OMSB Radiology Practice Test Features

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Oman Medical Specialty Board Radiology Sample Test

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The protective framework that helps humans to breathe and aid in blood circulation is called:

Correct Answer:

bony thorax

the correct answer to the question "the protective framework that helps humans to breathe and aid in blood circulation is called" is the "bony thorax." the bony thorax, also known as the thoracic cage, plays a crucial role in the human body. it is not only a structural framework that provides protection but also significantly supports the respiratory and circulatory systems.

as part of the skeletal system, the bony thorax is primarily composed of the ribs, the spine at the back, and the sternum or breastbone at the front. this arrangement forms a sturdy yet flexible cage that encloses vital organs such as the heart and lungs, shielding them from mechanical injuries.

the bony thorax facilitates breathing through its dynamic design. the ribs are connected to the spine via joints that allow for an upward and outward movement during inhalation. this expansion increases the volume of the chest cavity, reducing internal pressure and allowing the lungs to expand and fill with air. during exhalation, the ribs and sternum return to their original positions, helping to expel air from the lungs.

moreover, the movement of the bony thorax assists in blood circulation. the expansion and contraction of the thoracic cage during breathing create pressure changes within the chest cavity that aid in the venous return of blood to the heart. this is vital for maintaining efficient blood circulation throughout the body.

the sternum of the bony thorax includes three main parts: the manubrium, the body, and the xiphoid process. each of these parts serves as an attachment site for various muscles and ribs, contributing to the thoracic cage's flexibility and protective functions. the articulation of the ribs with the sternum and spine enhances the resilience and adaptability of the bony thorax to different movements and impacts, further safeguarding the organs within.

in summary, the bony thorax is essential for both protection and physiological functions such as breathing and blood circulation. its well-structured composition of bones and joints provides a balance between durability and flexibility, crucial for the body's overall health and functionality.