The terminal sulcus is a groove in the
right atrium of the
heart. The terminal sulcus marks the separation of the right atrial
pectinate muscles from the
sinus venarum. The terminal sulcus extends from the front of the
superior vena cava to the front of the
inferior vena cava, and represents the line of union of the
sinus venosus of the
embryo
An embryo is an initial stage of development of a multicellular organism. In organisms that reproduce sexually, embryonic development is the part of the life cycle that begins just after fertilization of the female egg cell by the male spe ...
with the
primitive atrium. On the internal aspect of the right atrium, corresponding to the terminal sulcus is the
crista terminalis.
The superior border of the terminal sulcus designates the transverse plane in which the
SA node resides. The inferior border designates the transverse plane in which the
AV node resides.
References
External links
Cardiac anatomy
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