Diaphragm Flashcards
which region of the thoracic cavity does the diaphragm sit
inferior thoracic aperture
what is the function of apertures on the diaphram
allow structures to pass between the thoracic and abdominal cavities
what structures pass through the aortic opening at T12
aorta
thoracic duct
azygous vein
what structures pass through the oesophageal opening at T10
oesophagus
vagus nerve
oesophageal branches of the gastric vessels and lymphatics
what other structures pass through the diaphragm
sympathetic trunk
left phrenic nerve
superior epigastric artery
which nerve innervates the diaphragm
phrenic nerve
what is the origin of the phrenic nerve
the ventral rami of the C3 C4 C5 nerve roots of the cervical plexus
what happens to the dome of diaphragm during INSPIRATION
flattens (contraction)
what happens to the dome of diaphragm during EXPIRATION
domes upwards (relaxation)
what are the muscles of respiration
the intercostal muscles
how many intercostal muscles are there
3:
- external- superficial
- internal intercostal
- innermost internal intercostal
where are the intercostal muscles found
in each intercostal space between the rib muscles. they move the thoracic cage to expand in AP diameter or expand in transverse diameter
what structures pass through venal caval opening T8
inferior vena cava
right phrenic nerve
