Explain how and why specific arteries and veins of the heart carry oxygenated versus deoxygenated blood in both systemic and pulmonary circulation.

To avoid mixing.

Explanation:

There are specific arteries and veins of the heart which carries blood by using systemic and pulmonary circulation in order to avoid mixing of oxygenated blood with deoxygenated blood. Oxygenated blood is rich in oxygen that is needed by our body that is transported by pulmonary circulation, while on the other hand, the deoxygenated blood carries by systemic circulation from the cells to the lungs due to waste material in it in the form of carbondioxide gas.

They have the highest thinking capacity as compared to other living organisms. Sufficient food availability to all living organisms and their stability reflect the existence of ecological balance. Therefore, this balance is very important because it ensures survival, existence and stability of the environment.