Oesophagus - Macroscopic structure: Flashcards
(6 cards)
1
Q
What is the oesophagus? (macroscopic description)
A
A muscular tube, about 25 cm long.
2
Q
How many main constrictions (narrow parts) does the oesophagus have?
A
Three constrictions.
3
Q
Where is the first constriction of the oesophagus?
A
At the top, at the upper oesophageal sphincter.
4
Q
Where is the second constriction of the oesophagus?
A
Where it is crossed by the aortic arch.
5
Q
Where is the third constriction of the oesophagus?
A
Where it passes through the diaphragm.
6
Q
Why are the constrictions important?
A
Because food or objects can get stuck there more easily.
