Podcast
Questions and Answers
Which structure passes through the caval hiatus of the diaphragm?
Which structure passes through the caval hiatus of the diaphragm?
Which nerve innervates each half of the diaphragm?
Which nerve innervates each half of the diaphragm?
What is the action of the diaphragm related to respiration?
What is the action of the diaphragm related to respiration?
Which is the highest dome of the diaphragm and why?
Which is the highest dome of the diaphragm and why?
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Which opening in the diaphragm transmits the aorta?
Which opening in the diaphragm transmits the aorta?
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Study Notes
Lymphatic Drainage
- Lymphatic vessels are located above the umbilicus
Diaphragm Structure
- The diaphragm is attached to the central tendon, which is an aponeurosis
- The right dome of the diaphragm is slightly higher than the left due to the liver
Innervation of the Diaphragm
- Each half of the diaphragm is innervated by the right or left phrenic nerve (C3-C4)
Functions of the Diaphragm
- Primary muscle of respiration
- Increases intra-abdominal pressure for:
- Defecation
- Urination
- Vomiting
- Childbirth
Apertures of the Diaphragm
-
Caval Hiatus (T8)
- Transmits the Inferior Vena Cava (IVC)
-
Esophageal Hiatus (T10)
- Transmits the esophagus
- Transmits the vagus nerves
- Transmits the left gastric vessels
-
Aortic Hiatus (T12)
- Transmits the aorta
- Transmits the thoracic duct
- Transmits the azygos and hemiazygos veins
- Transmits the sympathetic nerves
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Description
This quiz covers the anatomy and function of the diaphragm, including its lymphatic drainage, insertion, innervation, and action.
