Double Circulation: Pulmonary & Systemic — NEET Biology
📚 Practice ConceptWe have a complete double circulation, i.e., two circulatory pathways, namely, pulmonary and systemic are present. The pulmonary circulation starts by the pumping of deoxygenated blood by the right ventricle which is carried to the lungs where it is oxygenated and returned to the left atrium. The systemic circulation starts with the pumping of oxygenated blood by the left ventricle to the aorta which is carried to all the body tissues and the deoxygenated blood from there is collected by the veins and returned to the right atrium. Though the heart is autoexcitable, its functions can be moderated by neural and hormonal mechanisms.
Arrange the following structures in the correct sequence for double circulation and assign 1 = deoxygenated, 2 = oxygenated next to each: Structures: A. Left Ventricle B. Pulmonary Veins C. Right Atrium D. Aorta E. Lungs F. Right Ventricle G. Left Atrium H. Pulmonary Artery
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