Question

A red blood cell entering the right side of the heart passes by or through the following structures
1.Atrioventricular valves
2.Semilunar valves
3.Right atrium
4.Right ventricle
5.SAN
Which of the following options represent the correct sequence?
A) 2->3->1->4->5
B) 3->1->5->2->4
C) 3->5->1->4->2
D) 5->3->1->4->2

Answer 1

Hint: There are two sides to the heart, divided by an internal wall called the septum. To pick up oxygen, the right side of the heart pumps blood to the lungs.

Complete answer:
With the red cell being formed within the bone, the journey begins. It develops in several stages in the bone marrow, starting as a hemocytoblast and then after 2 to 5 days of growth, becoming an erythroblast.It becomes a reticulocyte after loading it with haemoglobin, which then becomes a fully matured red blood cell.
The red blood cell begins travelling to the heart through capillaries after development. The cells in the blood are currently deoxygenated.

Now, inside the nucleus, the deoxygenated red blood cell finds its way to the vena cava and is then forced into the right atrium.
Then the right atrium contracts, forcing the blood cells into the right ventricle through the tricuspid.
Then the right ventricle contracts, forcing the red blood cells through the semilunar out of the heart.

Road of blood through the heart
1. Blood joins the right atrium of the upper and lower venae cavae,
and the coronary sinus.
2. It passes through the tricuspid valve to the right ventricle from the right atrium.
3. It passes through the pulmonary semilunar valves from the right ventricle to the trunk of the pulmonary.
4. It passes from the pulmonary trunk to the right and the left pulmonary arteries of the lungs.
5. Oxygenated blood from the lungs is returned to the heart by the heart.
the pulmonary veins.
6. Blood streams into the left atrium from the pulmonary veins.
7. Blood passes through the bicuspid (mitral valve from the left atrium into the
the left ventricle .
8. It passes through the aortic semilunar valves from the left ventricle into the ascending aorta.
9. Blood is allocated from the aorta to the rest of the body (systemic circulation).

Hence, the correct answer is option (C)

Note: In certain cases, the body may have too few red blood cells to provide the oxygen needed by the extremities of the body, such as illnesses or blood loss after injury or childbirth. This is where it becomes important for a blood transfusion.