Double Circulation

Q. The diagram given below represents the simplified pathway of the circulation of blood. ​

Answer the questions that follow: ​

1. Name the blood vessels labelled 1 to 4. ​

2. Which blood vessel supplies oxygenated blood to the muscles of the heart? ​

3. What is the importance of the blood vessel labelled 5? ​

4. What is the type of blood circulation that takes place between the heart and the lungs? ​

5. Draw a diagram of the different blood cells as seen in a smear of human blood.​

​ [5 Marks]

Q.

In amphibians, a three chambered heart causes the mixing of oxygenated and deoxygenated blood. Which of the following is the effect of this type of arrangement?

1. Efficient energy generation.

2. Maintenance of a constant body temperature

3. Efficiency in transporting oxygen.

4. Inefficiency in transporting oxygen.

Q.

The term “pulmonary circulation” is related to the:

1. Heart

2. Lungs

3. Both heart and lungs

4. Arteries

Q.

The circuit through the lungs where the deoxygenated blood is oxygenated before it enters the heart is called the ___ circulation.

1. Pulmonary circulation

2. Portal circulation

3. Systemic circulation

4. None of these

Q. Oxygenated blood flows from the left atrium into the ______.

1. right pulmonary vein
2. left ventricle
3. right atrium
4. right ventricle

Q.

Which of the following organisms have double circulation?

1. Human

2. Birds

3. Crocodiles

4. All of these

Q.

For reaching the left side of the heart, blood must pass through_______.

1. liver

2. kidneys

3. lungs

4. brain

Q.

Blood flowing in pulmonary vein is_______

1. deoxygenated

2. mixed

3. oxygenated

4. none of above

Q.

Which of the following is true about the circulatory system of animals?

1. Only vertebrates, annelids and cephalopods, have closed circulatory system.

2. All vertebrates have separate pulmonary and systemic circulations.

3. The circulatory system of Mammals and Birds are similar to Amphibians.

4. Animals can have only one heart or else the circulatory system would not work.

Q.

Which of these statements are correct?
(i) All vertebrates have four-chambered hearts.
(ii) Deoxygenated and oxygenated blood are separated in animals with high energy needs.
(iii) Fishes have double circulation.

1. (i)

2. (iii)

3. (ii)

4. (i), (ii) and (iii)