Double Circulation
Trending Questions
Why is it necessary to separate oxygenated and deoxygenated blood in mammal and birds ? Give examples.
Why is the left ventricular wall of the heart thicker than the right ventricular wall?
To accommodate a greater volume of blood
To expand the thoracic cage during diastole
To pump blood with greater pressure
To pump blood through a smaller valve
Describe double circulation in human beings with the help of diagrams. Why is double circulation necessary? [5 MARKS]
Given below is a highly schematic diagram of the human blood circulatory system.
(a) Which part (state the number) represents the hearts? Give reason ink support of your answer.
(b) Which numbers represent the following respectively?
Aorta Renal vein
Hepatic portal vein Stomach
Pulmonary artery Dorsal aorta
Superior vena cava
How is oxygenated blood different from deoxygenated blood?
3.(a)Oxygenated and Deoxygenated blood is seperate in the heart of Mammals .Give reaseon.
Which chamber of heart receives oxygenated blood from lungs ?
What is exhalation?
| Option | Carries blood from heart to body cells | Carries blood from heart to lungs | Carries blood from lungs to heart | Carries blood from the body cells to heart |
| A. | i | ii | iii | iv |
| B. | i | iii | iv | ii |
| C. | ii | iv | iii | i |
| D. | iii | i | iv | ii |
[0.8 Mark]
- A
- B
- C
- D
Write a short note on pulmonary circulation.
In lungs, the air is separated from the venous blood through
squamous epithelium + endothelium of blood vessel
transitional epithelium + tunica externa of blood vessel
squamous epithelium + tunica media of blood vessel
none of the above
The nearest organ to which the heart supplies oxygenated blood is
(a) Lung (b) Stomach (c) intestine (d) Heart itself
Which of the following have the thickest wall?
Artery
Vein
Capillary
Arteriole
What is meant by the term 'double circulation' of blood in mammals? What is diastole?
The nearest organ to which the heart supplies oxygenated blood is
A Lung
B Stomach
C Intestine
D Heart itself
Question 8 (iii)
Given below is a square of letters in which are hidden different words related to respiration in organisms. These words may be present in any direction – upwards, downwards, or along the diagonals. Find the words for your respiratory system. Clues about those words are given below the square.
(iii) Muscular floor of chest cavity
What does the term "double circulation" mean?
Do pulmonary arteries carry oxygenated blood?
Why is blood needed by all parts of the body?
Name two layers of pleura.
How many fish are there in the sea?
What are the mechanics of breathing?
Angina Pectoris is due to
(a) defective nutrition
(b) chest pain due to an inadequate supply of oxygen to the heart muscle
(c) defective functioning of the mitral valve
(d) infection by a virus
What is the first vessel of systemic circulation?
(b) With the help of a flow chart explain the process of circulation of blood between human heart and body?
Question 81
Describe the flow of blood through the heart of human beings.
What is plural fluid? Where is it present?what are its symptoms?
What kind of breathing humans do?
