Question

Given alongside is a diagram of the human heart showing its internal structure. Label the parts marked 1 to 6, and answer the following questions.

(a) Which type of blood is carried by the blood vessel marked 2 ?
(b) Name the main artery which takes the blood from heart to different parts of the body.
(c) Which chamber of the heart receives deoxygenated blood from the body ? <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> [Review Questions 7 Pg No. 63 ]

Answer 1

Answer
(a)Superior Vena cava

• It is one of the two venae cavae.
• It is one of the great Venous trunks.
• it helps in returning the deoxygenated blood from the systemic circulation to the Right Atrium.
• it helps in receiving the Venous return from the head of the body.

(b)

• The aortic arch or the aorta is the main artery that takes blood from the heart to different parts of the body.
• The head, neck and arms of the body receive oxygen from the aortic arch.

(c)

• The Chamber that receives the deoxygenated blood from the body is the right Atrium.
• It is the right upper chamber of the heart

• In this diagram of the human heart the internal structures that are labelled and mark as 1-6 are as follows:

1.Left Pulmonary artery

• It is a branch of the pulmonary trunk.
• It branches at the level with the transthoracic plane.
• It is shorter in size than the right Pulmonary artery.
• it represents the direct posterior continuation of the trunk.

2.Superior Vena cava

• It is one of the two venae cavae.
• It is one of the great Venous trunks .
• it helps in returning the deoxygenated blood from the systemic circulation to the right Atrium.
• it helps in receiving the Venous return from the head of the body.

3.Left Pulmonary vein

• It helps in transferring the oxygenated blood from the lungs to the heart.
• It is the largest Pulmonary vein.
• It is part of the pulmonary circulation.

4. Right auricle

• It is also known as the right atrial appendage.
• it is attached to the right Atrium of the heart.
• It is a small pouch That is cone shaped and comes out from the upper and the front part of the Atrium overlapping the root of aorta.

5. Left auricle

• It is also known as the left atrial appendage.
• it is the heart wall that is found on the anterior surface of the left Atrium.

6. left ventricle

• It is one of the four Chambers of the heart.
• it is located at the bottom left of the heart below the left Atrium.
• the mitral valves separates it.
• The blood while the heart contracts flows into the left Atrium through the mitral valve and enters the left ventricle.