1) Explain the process of circulation in the body, startimg eith ghe superior/inferior vena cava

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Answer

Vena cava brings deoxygenated blood back to the heart. Superior vena cava brings deoxygenated blood from upper body organs and Inferior vena cava brings deoxygenated blood from lower body organs.
Vena cava drains blood into right atrium.
Upon atrial contraction, the blood flows into right ventricle via tricuspid valve.
The blood in right ventricle is pumped into pulmonary trunk during ventricular contraction via pulmonary semilunar valve.
Pulmonary trunk divides into right and left pulmonary arteries that carry blood into right and left lung respectively.
Lungs are the primary organ of respiratory organs. Gaseous exchange occurs between pulmonary capillaries and alveoli of the lungs. The blood becomes oxygenated at the end of pulmonary capillaries.
Pulmonary veins brings oxygenated blood back into the left atrium of the heart.
The blood from left atrium flows into left ventricle via bicuspid valve.
During ventricular contractions, this blood is pumped into aorta via aortic semilunar valve.
Aorta divides into systemic arteries that supplies oxygenated blood to all the body organs.
The gaseous exchange takes place between systemic capillaries and cells in body tissues.
The blood becomes deoxygenated at the end of systemic capillaries.
Systemic veins drains deoxygenated blood into superior or inferior vena cava.

Sydney Mullin answered 2 years ago

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