The splenic artery arises from the ..........

Which artery carries deoxygenated blood,unlike all other arteries?

What is the significance of the atrio-ventricular node and atrio-ventricular bundle in the functioning of the heart?

In birds and mammals,the oxygenated blood is received by ...$A$... and deoxygenated blood is received by ...$B$.... The ventricles pump it out without any mixing of oxygenated and deoxygenated blood. Choose the correct option for $A$ and $B$.

Identify the option showing the correct labeling for $p$,$q$,$r$ and $s$ with reference to the conducting system of the human heart.

$A$ pacemaker is one that influences the