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The chamber that receives blood from major veins (vena cava) in the frog heart is the
AConus arteriosus on the ventral surface
BSinus venosus opening into right atrium
CLeft atrium receiving from pulmonary vein
DSingle ventricle pumping mixed blood
Answer & Solution
Correct answer: B. Sinus venosus opening into right atrium
The triangular sinus venosus collects venous return from vena cava and opens into the right atrium of the frog heart. The left atrium receives oxygenated blood from the lungs and skin via pulmonary-cutaneous veins.
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