Question

What are the layers of the heart, from the inside to the outside?

Answer 1

Hint: The heart is an organ that beats incessantly to act as a pump for the vehicle of blood, which transports various substances with it. The heart transports deoxygenated blood to the lungs for oxygenation and returns oxygenated blood to the heart. It transports oxygenated blood to various parts of the body.

Complete answer:
Endocardium is the innermost epithelial layer of the heart.
Muscular Middle Layer - Myocardium
Layer Pericardium - Visceral (Epicardium)
The pericardium is also known as the pericardial cavity.
Pericardium-Parietal (Epicardium)
Fibrous Pericardial Layer – Pericardium
In heart, the endocardium - the innermost epithelial layer is in contact with blood.
Myocardium - Middle Muscular layer - contractile, ventricular tissue thicker and atrial layer is more thin.
Visceral pericardium (Epicardium) Layer - represents the myocardium.
Pericardium - Pericardial Cavity - filled with pericardial fluid to reduce grating during heart development
The pericardium - Parietal (Epicardium) Layer - protects the pericardial cavity.
Fibrous Pericardial Layer - a thick stringy sac that surrounds the heart.
The pericardium, also known as the pericardial sac, is a membrane that surrounds the heart and characterises pericardial depression. It also includes the "roots" of the major vessels, or the spaces that are closest to the heart. The pericardium is made up of two sublayers: the tough external stringy pericardium and the internal serous pericardium, which literally means "around the middle."

Note:
Excess fluid in the pericardial area can result in a condition known as cardiac tamponade or pericardial tamponade. More fluid – in most cases blood – builds up in the pericardial cavity with each cardiac contraction. For the next contraction the heart must relax in order to fill with blood. But excessive fluid in the pericardial cavity puts pressure on the heart and prevents complete relaxation, so as each heart cycle begins, the chambers in the heart contain slightly less blood.