Axial Skeleton: Vertebral Column and Thoracic Cage C) Thoracic Cage
How many pairs of ribs?
12
number of clavicular notches
2
Lateral costal notches of the Gladiolus, is where ribs ___ ___ attach
2-7
how many total ribs?
24
Costal cartilages of ribs ______ fuse to the costal cartilage of rib 7 and thus ______ articulate with the sternum:
8-10 indirectly articulate with the sternum
the ___ of a rib indicates the site where the tubular ____ begins curving anteriorly towards the sternum
Angle Shaft
Why are ribs 8-12 false:
Because their costal cartilages, if present, do not attach directly to the sternum
Why are ribs 11-12 "floating ribs" ?
Because they have no connection at all with the sternum
Sternum AKA
Breastbone
A single pair of ____ ______ represent articulations for the first ribs' costal cartilages
Costal notches ON MANUBRIUM
Longest part of sternum
Gladiolus
The shallow indentation between the clavicular notches:
Jugular notch
Xiphoid process serves as an attachment side for the ____ muscles
abdominal
Does the xiphoid attach to the ribs?
NO
Why is the sternal angle and important landmark?
because the costal cartilages of the 2nd ribs attach here So, it may be used to count the ribs
Gladiolus AKA
body of sternum
Human sacrifice in central america among aztecs may have used what technique to acquire the heart?
breaking off xiphoid to get to heart
clavicular notches articulate the sternum with the left and right ______
clavicles (collarbone)
ribs 8-12
false ribs
The body and the manubrium articulate at the:
sternal angle
horizontal ridge that may be palpated under the skin ( between manubrium and gladiolus)
sternal angle
sword shaped bone that forms the anterior midline of the thoracic wall:
sternum
Suprasternal fossa is just ____ to the jugular notch, rope like muscles form lateral boundaries of this loss:
superior
Why are ribs 1-7 "true"
They connect individually to the sternum by separate cartilaginous extensions called "Costal cartilages"
Each pair of ribs originate on or between the _____ vertebrae and end in the anterior wall of the _____
Thoracic vertebrae thorax
The ____ of the rib articulates with the costal facet on the transverse process of the thoracic vertebra (except ribs ___ and___ which lack ___
Tubercle 11/12 Tubercles
Small, inferior cartilaginous projection of the sternum:
Xiphoid process
Jugular notch AKA
Suprasternal notch
Blunt trauma to the xiphoid may fracture it off the body and drive it into the ____ or ____
liver or heart
Between the head and the tubercle of the rib there is a constricted ___
neck
When does the xiphoid process ossify:
often not until after the age of 40
Costal cartilages connect:
ribs to the sternum
Do males or females have more ribs?
they have the SAME number of ribs
ribs 1-7
true ribs
Manubrium contains:
1) clavicular notches 2) jugular notch
Typical landmarks of the ribs:
1) head of rib 2) tubercle of rib 3) Neck of rib 4) Angle of rib 5) shaft/body
What vital organs does the thoracic cage protect?
1) heart 2) lungs 3) trachea 4) esophagus
3 parts of sternum:
1) manubrium 2) Gladiolus (body) 3) xiphoid process
What parts of the sternum contain lateral costal notches?
1) manubrium 2) gladiolus
The thoracic cage is an attachment point for muscles supporting the:
1) pectoral girdle 2) chest 3) neck 4) shoulders 5) back 6) Muscles involved in respiration
Function of thoracic cage:
1) protect vital organs 2) Attachment point for muscles 3) hematopoiesis
*Where does hematopoiesis occur within the Thoracic cage?
1) ribs 2) Vertebrae 3) sternum
Thoracic cage is formed by:
1) thoracic vertebrae posteriorly 2) Ribs laterally 3) Costal cartilages anteriorly 4) sternum anteriorly
fibs 11-12
floating ribs
The vertebral end of a rib typically articulates with the costal facet (or demifacet) of a thoracic vertebrae by the ___ of the rib
head
sternal notch aka
jugular notch
