Anatomy Of The Thorax Flashcards
What is the manubriosternal joint attached to?
The second costal cartilage
What lies behind the sternal angle?
The bifurcation of the trachea
What is the thoracic inlet formed by?
T1, rib 1 and the manubrium of the sternum
Why should the needle used to drain a pneumothorax be inserted just above the superior border of a lower rib?
This is to avoid the neurovascular bundle which runs in the costal groove on the inferior side of the ribs
What is the usual number of vertebrae in the spine of an adult?
33
How many cervical vertebrae are there?
7
How many thoracic vertebrae are there?
12
How many lumbar vertebrae are there?
5
How many sacral vertebrae are there?
5
How many coccygeal vertebrae are there?
4
What is the main muscle used during quiet inspiration?
Diaphragm
What main muscles are used during quiet expiration?
None this is achieved by the elastic properties of the lung tissue
What vessels do the intercostal arteries (arising from branches of the aorta) anastomose with?
The internal thoracic artery
From what vessels does the azygos vein arise from?
The right ascending lumbar and right sub costal vein
At what vertebral level does the aorta cross the diaphragm?
T12
What does the left coronary artery commonly branch to form?
The circumflex and anterior interventricular arteries
From what vertebral levels does the phrenic nerve arise from?
C3, C4, C5
Where does the vagus nerve arise from?
Cranial nerve 10
Where would you place the diaphragm to auscultate the mitral valve?
Left 5th intercostal space near the mid clavicular line
At what vertebral level does the thoracic duct begin?
L2
