Thoracic Cage Labeling Quiz

Thoracic Cage Terminology

• True ribs (1-7): These ribs directly attach to the sternum via costal cartilage, providing stability and protection to vital organs.

• False ribs (8-12): These ribs do not have a direct attachment to the sternum. Ribs 8-10 connect to the sternum indirectly through the costal cartilage of the rib above.

• Floating ribs (11-12): These two ribs have no anterior attachment to the sternum or costal cartilage, providing minimal protection to the lower back and are often more flexible.

• Costal margin: The lower edge of the rib cage, formed by the cartilages of the false ribs, significant for assessing surgical access and respiratory mechanics.

• Costal cartilage: Composed of hyaline cartilage, it connects ribs to the sternum, allowing flexibility and expansion during breathing.

• Intercostal spaces: The spaces between adjacent ribs, containing muscles, nerves, and blood vessels critical for breathing and thoracic stability.

• Xiphoid process: The small, cartilaginous extension at the lower end of the sternum, used as a landmark in CPR and anatomical identification.

• Xiphisternal joint: The junction between the xiphoid process and the body of the sternum, important for delineating the superior limits of the liver.

• Body (of sternum): The longest segment of the sternum, articulating with true ribs and forming the main bulk of the breastbone.

• Sternal angle: The ridge between the manubrium and the body of the sternum, indicating the second rib's location and used as a reference point for various anatomical structures.

• Manubrium: The broad, upper part of the sternum that connects with the clavicles and first two pairs of ribs, playing a crucial role in upper thoracic structure.

• Sternum: The central bone in the chest region comprising three parts (manubrium, body, xiphoid process), critical for protecting the heart and lungs.

• Clavicular notch: A depression on the manubrium where the clavicle articulates, contributing to the shoulder girdle's stability.

• Jugular notch: The central indentation located at the superior border of the manubrium, important for anatomical reference and central access in medical procedures.

Test your knowledge on the components of the thoracic cage with this labeling quiz. Identify terms related to true ribs, false ribs, floating ribs, and other key structures. Perfect for students studying anatomy and physiology.