Transverse sinus
Definition
:
It is a
transverse passage between two tubular reflections of serous pericardium and is
lined by visceral layer only. It is an inter-visceral space.
Boundaries
:
In front
: ascending aorta and pulmonary trunk enclosed in a single tube of serous
pericardium because both are developed from the truncus arteriosus
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Behind intra-pericardial
part of superior vena cava and upper margin of left atrium
Above bifurcation
of pulmonary trunk
Below upper
surface of left atrium
Development:
it is
developed after degeneration of the central cells of the dorsal mesocardium .
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