Question

Which one of the following is correct?
A. The left atrium and left ventricle- oxygenated blood, right atrium and right ventricle- deoxygenated blood
B. The left atrium and left ventricle- deoxygenated blood, right atrium and right ventricle- oxygenated blood
C. Both a and b
D. None of the above

Answer 1

Hint: Mainly blood is made up of solids and liquid. The liquid part of blood is known as plasma, it is made up of water, protein salts. There are RBC and WBC in our blood and they play a very major role in our body. RBC cells transport the oxygen from our lungs to the organs and tissues. On the other side, WBC cells fight with the infection and protect our immune system.

Complete answer:
 The left atrium and a left ventricle: -
The oxygen-rich blood flows from the lungs and back into the left atrium (LA), or in the heart the upper left chamber, with the help of four pulmonary veins. The walls of the left atrium are thicker than the right atrium. The pulmonary arteries carry the impure blood to the right and left lungs. Our left half of the heart carries the oxygenated blood and collects and pumps it all over our body.
On the other side, the oxygen-rich blood then flows with the help of the mitral valve into the left ventricle or the left lower chamber of our heart. It pumps the oxygenated blood with the help of an aortic valve into the aorta and the main artery takes the oxygen-rich or oxygenated blood out to the rest of our body.
The right atrium and right ventricle: -
In our heart, the blood first enters the right atrium. The blood always passes from the right atrium with the help of the tricuspid valve and in the right ventricle. Whenever the right ventricle contracts, the muscular force pushes the blood with the help of the pulmonary semilunar valve in the pulmonary artery. The blood of our body travels to the lungs, and in where it receives oxygen.

Hence, the correct option is (A) the left atrium and left ventricle-oxygenated blood, right atrium and right ventricle- deoxygenated blood.

Note:
The oxygen-poor blood is carried by the superior vena cava from the upper part in the body to the right atrium. The right atrium of the heart allows the oxygen-poor blood from the body with the help of the superior vena cava and the inferior vena cava and it pumps the blood to the right ventricle of the heart.