Question

Largest blood vessel in body is
(A) Carotid Artery
(B) Dorsal Aorta
(C) Phrenic Artery
(D) Coronary Artery

Answer 1

Hint: It is a U- shaped vessel that carries oxygenated blood from the left ventricle to all tissues in the body. It extends down to the abdomen. It helps in vertebrate embryos to transfer the blood from the aortic arches to the trunk and limbs.

Complete answer:
1.Thoracic cavity is the home of Heart. It exists in the middle section of the two lungs, and slightly tilted to the left side.
2.There are four chambers in our heart in which two small upper chambers known as atria and two larger lower chambers known as ventricles.
3.The same side of the existing atrium and the ventricle is separated by atrio-ventricular septum which is a thick fibrous tissue.
4.The left and right ventricles open into the pulmonary artery and the aorta respectively. This is provided with the semilunar valves.
5.The heart valves help in the flow of blood only in one direction either it will be from the atria to the ventricles or from the ventricles to the pulmonary artery.
6.Dorsal aorta is the largest one among all the blood vessels.

Usually, the heart chambers are in a relaxed state.
When the tricuspid and bicuspid valves are open, blood from the pulmonary veins and vena cava flows into the left and the right ventricle respectively through the left and right atria.

Hence, the correct answer is option (B)

Note: 1.All the arteries and aorta carries oxygenated blood
2.The pulmonary artery carries deoxygenated blood.
3.The Pulmonary vein carries oxygenated blood.
4.The veins carry deoxygenated blood.