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Questions and Answers
Which structure passes through the caval hiatus of the diaphragm?
Which structure passes through the caval hiatus of the diaphragm?
- Esophagus
- Thoracic duct
- Aorta
- IVC (correct)
Which nerve innervates each half of the diaphragm?
Which nerve innervates each half of the diaphragm?
- Hypoglossal nerve
- Vagus nerve
- Phrenic nerve (correct)
- Sympathetic nerve
What is the action of the diaphragm related to respiration?
What is the action of the diaphragm related to respiration?
- Secondary muscle of respiration
- Increases intra-thoracic pressure
- Stabilizes the rib cage
- Primary muscle of respiration (correct)
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.
