click below
click below
Normal Size Small Size show me how
Vertebrae and Ribs
Contains material from BIO 201 lab
Term | Definition |
---|---|
Cervical | 7 Vertebrae, part of the neck |
Thoracic | 12 Vertebrae, supports the ribs |
Lumbar | 5 Vertebrae, wider vertebrae found in the lower back |
Sacral | 5 fused vertebrae, part of the hip |
Coccyx | 4 fused vertebrae, makes the tailbone |
Atlas | C1. Articulates with occipital condyles to form synovial joint that allows for side-to-side and anterior/posterior movement |
Axis | C2. Contains bony projection called dens around which the atlas rotates, allowing a "no" movement |
Body (centrum) | Thick, cylindrical part of the vertebra responsible for bearing weight. |
Vertebral foramen | Hole formed by vertebral body and arch. |
Transverse foramen | All cervical vertebrae contain this opening in both transverse processes through which vertebral arteries supply blood to the brain pass. |
Sternum | Breastbone--located in anterior midline of the thorax and serves as an anchor point for the clavicles and most of the ribs (via costal cartilage) |
Manubrium | Superior bone of the sternum, where the clavicles attach |
Body | The longest part of the sternum, flat portion |
Xiphoid Process | Landmark at inferior end of sternum |
True Ribs | 7 pairs of these (pairs 1-7), connected directly to the sternum |
False Ribs | 5 pairs of these (pairs 8-12), are not connected directly to the sternum; rather, the cartilage they connect to are fused |
Floating Ribs | 2 pairs of these (pairs 11-12), are not connected to the sternum at all |
Costal Cartilage | Bars of hyaline cartilage that prolong the ribs and adds elasticity to the walls of the thorax |
Head of the Rib | Contains an articular facet by which it attaches to the body of a thoracic vertebra, allowing for movement of rib during breathing |
Tubercle of Rib | Attaches to the transverse process of a thoracic vertebra, allowing for movement of rib during breathing |