In our heart, all the four chambers are completely partitioned. It results in non-mixing of oxygenated blood with deoxygenated blood. Explain the double circulation related to it.

Explanation

Circulation of the blood was first described by William Harvey in 1628. There are two types of blood circulation in vertebrates, single circulation and double circulation.
The blood circulates twice through the heart first on the right side then on the left side to complete one cardiac cycle.
The complete double blood circulation is more prominent in mammals because of the complete partition of all the chambers (Auricles and ventricles) in the heart.
In systemic circulation, the Oxygenated blood entering the aorta from the left ventricle is carried by a network of arteries, arterioles and capillaries to the tissues. The deoxygenated blood from the tissue.
This increases the diffusion distance and reduces the efficiemcy of the gas exchange.
In contrast high pressure is required to force blood through the long systemic circuits.
Hence the arteries close to the heart have increased pressure than the arteries away from the heart. • Completely separated circuits (pulmonary and systemic) allow these two different demands to be met with.