The study of an organ is called Splanchnology. There are different types of organs and these are the heart, kidney, lungs and etc.
The correct answer is option A which is a pacemaker.
What is the heart?
The organ which helps to pump the blood to the different parts of the body is called the heart.
According to the question, Hearts get the signal to contract from the SA node, and the artificial SA node is also known as the pacemaker which gives the artificial electrical impulses.
Hence, the correct answer is option A.
For more information about the organs, refer to the link:-
https://brainly.in/question/3403229
