Question

Describe how the blood flows through the heart (similar to a circuit), include each step using the medical terms . Describe how and why blood needs to be sent to the lungs and why it is then sent back to the heart.

Answer 1

Heart has four chambers: 1)right atrium 2)right ventricle 3)left atrium 4)left ventricle.

Blood enters into the right atrium through two major veins called superior vena cava and inferior vena cava. The deoxygenated blood reaches the right atrium through these veins. After reaching right atrium the blood then goes into right ventricle due to contraction of atrium.

From ventricles blood is pumped into pulmonary aorta it then divides into two pulmonary arteries which takes the deoxygenated blood to lungs.

In lungs oxygenation of blood occurs.

After that oxygenated blood reaches the left atrium through four pulmonary veins. These four pulmonary veins carry oxygenated blood from lungs to left atrium.

After reaching the left atrium the blood is then pumped into left ventricle.

From left ventricle the blood is pumped into the systemic aorta by ventricular contraction , which further divides in various arteries and supply oxygenated blood to body parts.

Blood is sent to lungs through pulmonary arteries for oxygenation and it is sent back to heart for supplying the oxygented blood to all body parts.