Study Guide Bony Thorax Flashcards
What does the bony thorax support?
Walls of pleural cavity and diaphragm
Protects heart and lungs
The bony thorax is formed by?
Sternum, 12 pairs of ribs, 12 thoracic vertebrae
What is conical in shape, narrower above then below and more wide than deep?
Bony thorax
What is directed anteriorly and inferiority and is centered over the midline if the anterior thorax?
Sternum or breastbone
Narrow flat bone about 6 inches is?
Sternum
The sternum consist of what 3 parts?
Manubrium
Body
Xiphoid process
The sternum supports?
The clavicles and provides attachment to the costal cartilages of the first 7 pairs of ribs
The superior portion of the sternum and is the widest portion is?
Manubrium
An easily palpable concavity on the superior border if the manubrium is?
Jugular notch
An oval articular facet that articulates with the sternum extremity of the clavicle is?
Clavicular notch
What is the longest part of the sternum?
Body
The body of the sternum is joined to the manubrium at the 2nd costal cartilage by?
Sternal angle
The manubrium and the body contribute to?
Attachment of the 2nd costal cartilage
The distal and smallest part of the sternum that lies over T10?
Xiphoid process
The xiphoid process is a useful bony landmark to help locate?
Superior portion of the liver
Inferior border of the heart
How many pairs of ribs are there?
12
What is a long, narrow, curved bone with an anteriorly attached piece of hyaline cartilage “costal cartilage”?
Rib
What ribs are true ribs? Why?
1-7
Because they attached directly to the sternum
What ribs are false ribs? Why?
8-12 because they do not attached directly to the sternum
What ribs are floating ribs? Why?
11-12
Because they are attached only to the vertebrae
What ribs are both floating and false ribs?
11-12
The spaces between the ribs are referred to as?
Intercostal spaces
The shortest broadest rib?
1st rib
A typical rib consist of?
Head, flattened neck, tubercle, and body
The ribs have ________ on their heads first articulation with the vertebrae?
Facets
What contains costal arteries, veins, and nerves?
Costal groove
Articulation between the upper limbs and trunk are what joints?
Sternoclavicular joints
The head of a rib is closely bound to the demifacets of two adjacent vertebral bodies to form a synovial gliding articulation called?
Costovertebral joint
What ribs all articulate with only one vertebral body?
1st, 10th,11th, 12th
The tubercle if a rib articulates with the anterior surface of the transverse process of the lower vertebra at?
Costotransverse joint (synovial gliding)