The pericardium.
It is composed of two layers: the fibrous pericardium (the outer layer that is made of tough connective tissue) and the serous pericardium (the inner layer in which serous fluid provides lubrication for the heart to beat with almost no friction).
The fibrous sac of tissue that encloses the heart is the pericardium. It provides protection for the heart.
The ribs, and the Sternum.
true
The area is known as a foci of necrotic tissue, eventually turning into fibrosed (scar) tissue. The process by which this occurs is tissue ischaemia (where not enough oxygen is supplied to the heart tissue to meet its requirements).
atrial and ventricular systole occur at the same time
Endocardium
The fibrous sac of tissue that encloses the heart is the pericardium. It provides protection for the heart.
The endocardium is a thin layer of tissue that lines the inside of the heart chambers and heart valves. It is located beneath the myocardium (muscle layer) and covers the inner surface of the heart.
Pericardium
The ribs, and the Sternum.
true
The pericardium is the sac surrounding the frog's heart.
If you mean what kind of muscle tissues it is a special tissue found only in the heart called cardiac muscle tissue. It sometimes referred to by professionals as myocardium.
The area is known as a foci of necrotic tissue, eventually turning into fibrosed (scar) tissue. The process by which this occurs is tissue ischaemia (where not enough oxygen is supplied to the heart tissue to meet its requirements).
Valves
septum
the cardiac muscle also known as myocardium is a muscular tissue of the heart