Eustachian valve is seen in -
Ans. is 'c' i.e., IVC opening in right atrium o Opening of IVC in right atrium is guarded by - Eustachian valve (rudimentary valve). o Opening of coronary sinus in right atrium is guarded by - Semilunar valve/Thebesian valve (functional valve)
Eustachian tube opening at nasopharyngeal end
Eustachian tube opening in tympanic cavity
IVC opening in right atrium
Coronary sinus opening in right atrium
Pericardium & Heart