Question

Double circulation how it take place inside the human heart

Answer 1

I will tell you a simple way to learn it.
The blood travels in this way,
Vena cava (DO) - right atrium (DO) - right ventricle (DO) - pulmonary artery ( DO) - lungs - pulmonary veins (O)- left atrium(O) - left ventricle (O) - aaorta (O) - different parts of the body (O) - back to vena cava (DO)
DO- deoxygenated blood
O- oxygenated blood
hope this helps.