Question

Blood supply to heart musculature is via
(a)Cardiac artery
(b)Coronary artery
(c)Aorta
(d)Pulmonary vein

Answer 1

Hint: The blood vessels which wrap the entire heart and transport oxygenated blood to the heart. These are of two types left and right. These blood vessels are present on the epicardium of the heart.

Complete answer:
It is important to supply blood to the heart with oxygen and nutrients to remove metabolic waste which is achieved by coronary circulation where the blood flow through coronary vessels helps in heart muscle relaxation or contraction of the heart.

Additional Information: -The heart is divided into four chambers which include two atria and two ventricles and ultimately go to the lungs.
-The heart is made up of three-layer- epicardium the outer layer, myocardium which is the middle layer, and endocardium the inner layer.
-The heart is surrounded by a tough double- fibrous membrane sac called the pericardium.
-The myocardium layer is also known as a cardiac muscle in which involuntary tissue.
-The endocardium layer secrets endothelins which play a major role in the contraction of the myocardium.
-The heart muscle uses lots of energy which requires regular blood flow provided by coronary arteries and then drained out by coronary veins.
So, the correct answer is ‘coronary artery’.

Note:
 - The right coronary artery supplies the blood mainly to the right side of the heart.
-The left coronary artery supplies the blood mainly to the left side of the heart and after that pumps blood to the rest of the body.