Question

Which of the following is the correct flow of the blood from the different parts of the body back to the heart?
1. When the heart ctracts, the right lower ventricle will pump the blood into the lungs, where the carbon dioxide is exchanged for oxygen.
2. after the exchange, the blood containing fresh oxygen flows into the left upper atrium.
3. when the heart contracts, the left lower ventricle will force the blood out to the body through a network of arteries.
4. Oxygen-rich blood flows from the left upper atrium into the left lower ventricle
5. The heart receives oxygen-deficient blood from the body into the rigth upper atrium

A. 2,1,4,3,5
B. 1,3,2,5,4
C. 5,1,2,4,3
D. 5,1,4,3,2

Answer 1

1)Blood enters the heart through two large veins – the posterior (inferior) and the anterior (superior) vena cava – carrying deoxygenated blood from the body into the right atrium. Blood flows from the right atrium into the right ventricle through the tricuspid valve.

Answer 2

The right order of flow of blood in a body is (c) 51243.

Explanation:

• Human heart is four chambered, it contains two ventricles and two atriums. Separating these chambers are valves called Bicuspid valve and Tricuspid valve.
• The deoxygenated  blood from all the body parts returns to the right atrium of the heart. (5)
• The right ventricle pumps blood into the lungs through pulmonary artery. The carbon  dioxide in the blood is exchanged with oxygen in the alveoli of the lungs. (1)

• The oxygenated blood then flows into the left atrium of the heart.(2)
• This oxygenated blood then is passed into the left ventricle from the left atrium. (4)
• The left ventricle contracts to pump blood throughout the body. The blood exits the heart through the aorta to supply oxygen to all the body parts. (3)