General anatomy and construction of human trunk
General anatomy and construction of the Human Trunk
The human trunk can be considered a hollow cylinder. A muscular membrane, the thoracic diaphragm, extends across this hollow and divides the trunk into upper and lower cavities.
Tabs Thoracic Cavity:
The thoracic cavity is the space of the trunk above the diaphragm. It is open to the outside by way of the neck and head. Since the wall of the thorax is reinforced by special muscles, bones, and cartilages, we can consider the thorax to be a "solid-walled container" filled with gas.
Tabs Abdominopelvic Cavity:
The abdominopelvic cavity is the rest of the trunk cavity below the diaphragm. The abdominopelvic cavity is a closed system. Its walls are "elastic" since they are made up of musculature. The abdominopelvic cavity is filled with a fluid continuum. This fluid continuum consists primarily of water contained in the soft tissues of the abdomen and the pelvis.
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