How many chambers does the heart of a frog have?

Two atria and one ventricle

The correct answer is Option (B) -Two atria and one ventricle

The heart of a frog has three chambers: two atria and one ventricle. The blood vascular system involves heart, blood vessels and blood. The lymphatic system consists of lymph, lymph channels and lymph nodes.

Heart is a muscular structure situated in the upper part of the body cavity. It has three chambers, two atria and one ventricle and is covered by a membrane called pericardium. A triangular structure called sinus venosus joins the right atrium. It receives blood through the major veins called vena cava.

The ventricle opens into a sac- like conus arteriosus on the ventral side of the heart. The blood from the heart is carried to all parts of the body by the arteries (arterial system). The veins collect blood from different parts of body to the heart and form the venous system.The circulation of blood is achieved by the pumping action of the muscular heart.