Question

In correct sequence, which heart chambers, heart valves, and blood vessels would a drop of blood encounter from the time it flows out of the right atrium until it reaches the aorta?

tricuspid valve, right ventricle, pulmonary valve, pulmonary arteries, pulmonary veins, left atrium, bicuspid valve, left ventricle, aortic valve

bicuspid valve, right ventricle, pulmonary valve, pulmonary veins, pulmonary arteries, left atrium, tricuspid valve, left ventricle, aortic valve

tricuspid valve, right ventricle, aortic valve, pulmonary veins, pulmonary valve, pulmonary arteries, left atrium, bicuspid valve, left ventricle

pulmonary valve, right ventricle, tricuspid valve, pulmonary arteries, pulmonary veins, left atrium, bicuspid valve, left ventricle, aortic valve

Answer 1

• Human heart is a four chambered muscular organ that pumps blood throughout the body.
• The upper two chambers are called atrium and lower two chambers are called ventricle.
• The septum separating atrium and ventricle is called atrioventricular septum.
• The septum separating left and right atria is called interatrial septum.
• The septum separating left and right ventricle is called interventricular septum.
• The opening between right atrium and right ventricle is guarded by tricuspid valve. The opening between left atrium and left ventricle is guarded by bicuspid or mitral valve.
• Pulmonary artery arises from right ventricle. The aorta arises from left ventricle. The opening of these blood vessels are guarded by semilunar valves.
• Specifically speaking,the semilunar valve of aorta is called aortic valve, and the semilunar valve of pulmonary artery is called pulmonary valve.
• Deoxygenated blood is brought from upper parts of the body by superior venacava and from lower parts of the body by inferior venacava into the right atrium.
• When right atrium fills up with blood, it contracts and the tricuspid valves open up. The blood flows into the right ventricle after which the tricuspid valves get closed.
• The right ventricle contracts and semilunar valves of pulmonary artery open up, thereby allowing the blood to flow into pulmonary artery. The semilunar valves then get closed. The blood then flows into lungs and gets oxygenated.
• This oxygenated blood is brought to left atrium by pulmonary veins.
• When left atrium gets filled, it contracts and the bicuspid valves open up. The blood flows into left ventricle and the bicuspid valves get closed.
• The left ventricle contracts and the semilunar valves of aorta open up followed by the flow of oxygenated blood into aorta. The semilunar valves get closed.

So, the answer is 1st option :

Tricuspid valves, right ventricle, pulmonary valves, pulmonary arteries, pulmonary veins, left atrium, bicuspid valves, left ventricle, aortic valve.