The Diaphragm - The Muscular System
How does one hold their breath
By a steady contraction of the diaphragm
Reproductive Tract Definition
Childbirth
Why is the superior surface of the diaphragm convex
Creates elevated floor of the thoracic cavity
Why is the inferior surface of the diaphragm concave
Creates the curved roof of the abdominal cavity
Intestinal Tract Definition
Defecation
Examples of valsalva maneuver
Defecation; Urination; Childbirth
The inferior side of the pericardial sac and the inferior surfaces of the pleural membranes do what
Fuse onto the central tendon of the diaphragm
The skeletal portions of the diaphragm do what
Insert into the tendon while having a number of origins
Caval Opening Definition
Opening in the diaphragm that allows inferior vena cava to pass through; foramen for the vena cava
Pleural Membranes Definition
Parietal pleura
Diaphragm Definition
Skeletal muscle that separates the thoracic and abdominal cavities and is dome-shaped at rest
What are to the sides of the tendon
Skeletal portions of the diaphragm
What does a steady contraction of the diaphragm do
Stabilize the volume and pressure of the peritoneal cavity
What happens when the pressure cannot push the diaphragm up
The abdominal muscles increases pressure on the intestinal tract, urinary tract, or reproductive tract
What is the change in volume of the thoracic cavity due to
The alternate contraction and relaxation of the diaphragm
The diaphragm includes three openings for the passage of structures between the thorax and the abdomen - aorta, thoracic duct, and azygous
The aorta, thoracic duct, and azygous vein pass through the aortic hiatus of the posterior diaphragm
Valsalva Maneuver Definition
The cooperation between the diaphragm and the abdominal muscles
The diaphragm includes three openings for the passage of structures between the thorax and the abdomen - esophagus
The esophagus and attached nerves pass through the esophageal hiatus
The diaphragm includes three openings for the passage of structures between the thorax and the abdomen - inferior vena cava
The inferior vena cava passes through the caval opening
The diaphragm includes three openings for what
The passage of structures between the thorax and the abdomen
What happens when the abdominal muscle contracts
The pressure cannot push the diaphragm up
Urinary Tract Definition
Urination
