________ Is partly derived from the sinus venosus

Question

Quizplus · Accepted Answer

The formation and subsequent fusion of the septum primum and septum secundum divide the primordial atrium into a right atrium and a left atrium.Initially,the sinus venosus opens into the dorsal wall of the primordial right atrium.By the end of the fourth week,the right horn of the sinus venosus is larger than the left.The right horn of the sinus venosus becomes incorporated into the wall of the right atrium,and the left horn forms the coronary sinus.The smooth part of the wall of the right atrium is known as the sinus venarum because it is derived from the sinus venosus.

________ Is Partly Derived from the Sinus Venosus