What is the shortest route that can be taken by the blood travelling from a leg to an arm in the human body?
Leg → heart → lungs → heart → arm
Leg → heart → lungs → liver → arm
Leg → liver → heart → lungs → arm
Leg → liver → stomach → heart → arm
The course of blood from the heart to the lungs and back to the heart is called
How does blood circulate between lungs and heart in human beings ?
Blood vessel carrying blood from lungs to heart is