#1
Which structure forms the anterior border of the thoracic cage?
Sternum
ExplanationForms the front boundary of the thoracic cage.
#2
What is the primary function of the thoracic cage?
Respiration
ExplanationMainly facilitates breathing.
#3
Which muscle is responsible for the elevation of the ribs during inspiration?
External intercostal
ExplanationContracts to lift the ribs during inhalation.
#4
Which radiographic view is commonly used to visualize the thoracic cage and its structures?
Lateral view
ExplanationProvides a side perspective of the thoracic cavity.
#5
Which ribs are considered 'true ribs'?
1-7
ExplanationFirst seven ribs that directly articulate with the sternum.
#6
What is the costal cartilage of the second rib articulating with?
Manubrium
ExplanationConnects with the upper part of the sternum.
#7
Which part of the sternum is at the level of the fifth intercostal space?
Sternal angle
ExplanationIdentified at the junction of the manubrium and the body of the sternum.
#8
The costovertebral joints are classified as which type of joint?
Cartilaginous
ExplanationClassified as cartilaginous joints.
#9
Which thoracic vertebrae articulate with the ribs?
T3-T12
ExplanationThoracic vertebrae that have rib attachments.
#10
What is the angle of the costal cartilage of the typical rib in relation to the vertebral column?
60 degrees
ExplanationForms an angle of approximately 60 degrees with the vertebral column.
#11
What is the function of the costal groove in ribs?
Protection of vessels and nerves
ExplanationProvides protection to blood vessels and nerves running along the rib.
#12
Which structure divides the superior and inferior mediastinum within the thoracic cavity?
Thoracic diaphragm
ExplanationSeparates the upper and lower sections of the mediastinum.