Which one of the following animals has two separate circulatory pathways?

Identify whether the given statements are true or false for double circulation.
$I$. It prevents the mixing of oxygenated and deoxygenated blood in the heart.
$II$. It circulates only oxygenated blood through the heart.
Choose the correct option accordingly.

How many double circulations are normally completed by the human heart in one minute?

The systemic circulation provides nutrients, $A$ and other essential substances to the $B$ and takes $C$ and other harmful substances away for elimination. Choose the correct option for $A, B$ and $C$.

Which of the following carries glucose from the digestive tract to the liver?

For reaching the left side of the heart,blood must pass through: