Rib Cage Flashcards
What are the functions of thoracic cage
1-protection of hearts and lungs and thymus and structures in thoracic cavity
2-attachment point for muscles involved in (1) breathing, (2) maintaining the position of the vertebral column, and (3) movements of the pectoral girdle (clavicles and scapulae) and upper limbs.
Which ones are true ribs
1-7
Red ones
Which ones are called false ribs
8-12
Green ones
Which ones are called floating ribs
11,12
Why are 1-7 ribs called true ribs
the true ribs are connected to the sternum by separate cartilages.
Why are 8-12 pribs called false ribs
because they do not attach directly to the sternum.
Why are 11-12 ribs called floating
because they have no connection with the sternum.
The costal cartilages of ribs — to — fuse together before reaching the sternum.
The costal cartilages of ribs 8–10 fuse together before reaching the sternum.
Name the parts
The typical rib consists of a —— ,—— and ——.
The typical rib consists of a head, neck and body
the crest of the head?
The head has two articular facets, which are separated by a wedge of bone, known as the crest of the head.
Tubercle
The tubercle is a bony prominence located at the junction between the neck and body which projects posteriorly.
Tubercle consists pf how many parts? Explain
1-smooth articular part
which articulates with the transverse process of the associated vertebra
2-nonarticular surface
roughened non articular part which forms the attachment of the costotransverse ligament.
Explain the morphology of the rib
Thin
Flat
Curved
Where does the curve of the rib become most prominent?
Costal angle
Wheres the costal angle
Function of costal angle
Attachment for some of the deep back muscles to the ribs.
Costal groove
Offers some protection and a path for the neurovascular bundle to follow.
What does the internal surface of typical rib contain?
The internal surface os concave and contains costal groove
Where is Tubercle
Where is tubercle
Which parts the costal GROOVE
Where is tubercle
Which one is the costal groove
1,2,3,4?
Find the head, neck and shaft of the rib
What is the head of the rib consist of
Consist of two articular facets separated by crest of the head.
Fill in the blanks
Which ribs are atypical
1,2,10,11,12
Why is rib 1 atypical
is shorter and wider than the other ribs. It only has one facet on its head for articulation with its corresponding vertebra.
The superior surface is marked by two grooves, which make way for the subclavian vessels.
Why is rib 2 atypical
is thinner and longer than rib 1, and has two articular facets on the head as normal. It has a roughened area on its upper surface, from which the serratus anterior muscle originates.
Why is rib 10 atypical
only has one facet – for articulation with its numerically corresponding vertebra.
Why is rib 11 atypical
have no neck, and only contain one facet, which is for articulation with their corresponding vertebra.
Why is rib 12 atypical
have no neck, and only contain one facet, which is for articulation with their corresponding vertebra.
Rib 1 is thinner than rib 2
False
Rib 2 is thinner and longer
Fill in the blanks with typical, atypical, floating
Name different sections of sternum
the manubrium,
body and
xiphoid process.
In children, these elements are joined by ———. Which ossifies to bone during adulthood.
Cartilage
the most superior portion of the sternum. Which is trapzoid in shape
Manubrium
The superior aspect of the manubrium known as the ———is visible underneath the skin.
Jugular notch
Where is jugular notch
Where is sternal angle
Sternal angle
1st costal notch
Where is Clavicular notch?
Where is clavicular notch
Either side of the jugular notch, there is a large ———. These articulate with the medial ends of the clavicles
Either side of the jugular notch, there is a large fossa. These fossae articulate with the medial ends of the clavicles
On the lateral edges of the manubrium, there is a ——— for articulation with the costal cartilage of the ——st rib, and a ——— for articulation with part of the costal cartilage of the 2nd rib.
On the lateral edges of the manubrium, there is a facet, for articulation with the costal cartilage of the 1st rib, and a demi facet (half-facet) for articulation with part of the costal cartilage of the 2nd rib.
Why is sternal angle used as an aid to count ribs?
. The sternal angle is commonly used as an aid to count ribs, as it marks the level of the 2nd costal cartilage.
Inferiorly, the manubrium articulates with the body of the sternum, forming the —————.
Sternal angle
The ——— is the most inferior and smallest part of the sternum. Located at the level of the T—— vertebrae.
In some individuals, ——— articulates with part of the costal cartilage of the ———th rib.
Xiphoid
T10
Xiphoid
Seventh
Where is xiphisternal junction?
Where is the body of sternum
Is this Atlas or a cervical
Cervical vertebra
Atlas? cervical? C1? Lumbar?
Atlas
Spinous process
Vertebral arch
Posterior tubercle
Uncus of vertebral body and body of vertebra
Where is transverse foreman
Vertebral foreman
Sulcus for spinal nerve
Superior articular process
