Unit 3 - Thorax, Abdomen, Pelvis, and Perineum: Diaphragm (Ex. III)

Question 1

lumbar diaphragm

Answer 1

O: M part - L1-L3 vertebral bodies, IV disks, and ALL as R and L crura; L parts - L and M arcuate ligaments
I: central tendon
Inn: phrenic n. (C3-C5, C plexus)
A: principle muscle of respiration (diaphragmatic and thoracic breathing); aids in compressing abdominal viscera (abdominal press)

Question 2

sternal diaphragm

Answer 2

O: P surface of xiphoid process
I: central tendon
Inn: phrenic n. (C3-C5, C plexus)
A: principle muscle of respiration (diaphragmatic and thoracic breathing); aids in compressing abdominal viscera (abdominal press)

Question 3

costal diaphragm

Answer 3

O: inner surface, lower margin of costal arch of ribs 7-12
I: central tendon
Inn: phrenic n. (C3-C5, C plexus)
A: principle muscle of respiration (diaphragmatic and thoracic breathing); aids in compressing abdominal viscera (abdominal press)