The trilobed valve present between the right atrium and the right ventricle in the mammalian heart is known as:

Purkinje fibres are found in

Given below are two statements.
Statement $I$: Visceral layer of serous pericardium forms the outer wall of human heart.
Statement $II$: Epicardium is formed of a thick layer of cardiac muscles.
In the light of the above two statements,choose the correct answer from the options given below.

The heart of a mammal is.....

Blood circulation was discovered by

Which of the following animals has a myogenic heart?