Question

Why does the heart have small blood vessels on it's surface?

Answer 1

Heart have small blood vessels on the surface of the its own to supply the oxygen and nutrients to tissues and remove the co2 and waste material from it.

Every organ is made up of group of tissue which need oxygen to survive and these work is done by the vessels.

There are 5 small vessels called

Arteries

Arterioles

Capillaries

Venules

Veins

These are the five vessels

Blood travels from heart into the arteries and gets divided into the smaller branches called arterioles and then it also goes into more fine vessels called capillaries where the exchange of nutrient and o2 occurs to the tissues and waste and co2 comes in vessels which goes in the venules and to that in the veins and returns to the heart.

This is the general mechanism heart also carry coronary arteries and veins with branches to supply the nutrient and oxygen to cardiac myocytes and remove waste from them.

These act to supply oxygen and nutrient to cardiac myocytes and control there movements of contraction and relaxation.