Question

A correct systemic circulation pathway is:
A. Right auricle -> Left Ventricle -> Aorta-> Tissues -> Veins
B. Right auricle -> Pulmonary aorta -> Tissues -> pulmonary vein -> Left auricle
C. Left auricle -> Left ventricle -> aorta -> Arteries -> Tissues -> Veins -> Right atrium
D. Left auricle -> Left ventricle -> Pulmonary aorta -> Tissues -> Right auricle.

Answer 1

Hint: Double circulation is the sequence of blood flow from the heart to lungs to back to heart then to whole body. In this process oxygenated blood comes from the lungs to the heart and deoxygenated blood from the heart goes to the lungs. Purification of the blood takes place.

Complete answer:
Blood is a very important fluid of our body which is very complex in the composition and liquid by the structure. It contains many nutrients, waste, hormones and whatever needs to be transported from one site to another blood carries that substance or molecule to that particular site.
So, blood flow starts as:
Pulmonary veins bring blood from the lungs to the left auricle. This is oxygenated blood.
Oxygenated blood from the left auricle goes to the left ventricle through bicuspid valves. Due to which we feel heartbeat. From this chamber blood which is oxygenated blood goes to the aorta which is the main artery of the human body. From aorta blood goes to further divisions of the arteries and reaches to each body part of the human. That means blood reaches to every tissue and cell of the body. These cells and tissues utilize the oxygenated blood for metabolic processes and release deoxygenated blood into the veins. All veins from the body bring back deoxygenated blood to the vena cava, main vein of the human body, which gives all the deoxygenated blood to the heart in the third chamber of the heart, that is, the right atrium. From the right atrium blood goes to the right ventricle through the tricuspid valve. From the right ventricle, the pulmonary artery carries deoxygenated blood to the lungs where lungs help in the converting deoxygenated blood into oxygenated blood.
This is the whole process of blood circulation.

So, correct option is option ‘C’ that is, Left auricle -> Left ventricle -> aorta -> Arteries -> Tissues -> Veins -> Right atrium.

Note: The circulatory system consists of the heart. Blood vessels and lungs. Hearts help in pumping of the blood to the all organs of the blood and lungs help in the purification of blood from deoxygenated to oxygenated blood. Vessels are the connecting pipes which connect to every organ, heart and lungs with each other.