William Harvey is known for the discovery of

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

Which of the following statements is correct regarding human circulation?

Given below are two statements regarding the circulation of blood in fishes.
Statement $I$: The heart of a fish contains only deoxygenated blood.
Statement $II$: Fishes show single circulation,and blood passes through the heart only once during each cycle.
In light of the above statements,choose the correct answer from the options given below.

Double circulation occurs in

Which one of the following represents pulmonary circulation?