Class 10 Science Practice Question Answers - Circulatory System

Fill in the blanks

1. Mineral which helps in formation of RBC's is _________.
2. Blood vessels without muscular walls are _________.
3. First heart sound is called _________.
4. Fishes have _________ chambered heart.
5. Amphibians have _________ chambered heart.
6. _________ heart pumps only deoxygenated blood.
7. Blood goes through the heart twice during each cycle is called _________.
8. High blood pressure is called _________.
9. The force that blood exerts against the wall of a vessel is called _________.
10. Contraction of heart chambers is called _________.
11. Relaxation of heart chambers is called _________.
12. _________ help in blood clotting.
13. White colored fluid other than blood which help in transportation is called _________.
14. Lymph carries digested and absorbed fat from _________.
15. Lymph drains excess fluid from extra cellular space back into _________.
16. Lymph drains into _________ for the intercellular spaces.
17. Lymphatic capilleries join to form _________.
18. Pumping organ in human body is _________.
19. Fluid medium of blood is called _________.
20. Oxygen is carried by the _________.
21. Blood platelets are also called _________.
22. Covering over heart is called _________.
23. _________ circulation is related with lungs.
24. The series of events which occur during one complete beat of the heart is known as _________ cycle.
25. The pressure wave transmitted all through the arterial system is known as _________.

Answer.
1. Iron 
2. Capillaries 
3. Lub 
4. Two
5. Three 
6. Fishes  
7. Double circulation  
8. Hypertension
9. Blood pressure 
10. Systole  
11. Diastole  
12. Platelets
13. Lymph  
14. Intestine  
15. Blood  
16. Lymphatic capillaries
17. Lymph vessels 
18. Heart 
19. Plasma  
20. RBC
21. Thrombocytes 
22. Pericardium 
23. Pulmonary  
24. Cardiac
25. Pulse

Match the columns

Answer.

1 → (e)
2 → (a)
3 → (b)
4 → (c)
5 → (d)
6 → (g)
7 → (f)
8 → (k)
9 → (i)
10 → (l)

True or False Statements

1. Vessels are able to contract and expand. (True)
2. While there is only one type of RBC, there are many white cell types. (True)
3. All animals have a system of vessels and tubes called a circulatory system. (True)
4. Blood is not a tissue because it is a fluid. (False)
5. Arteries are the widest blood vessels. (True)
6. Humans have an open circulatory system. (False)
7. The exchange of nutrients and waste products between the blood and cells occurs within the arteries. (False)
8. The liquid portion of the blood is called plasma. (True)
9. Living organisms must maintain a constant internal environment. (True)
10. Circulatory system also performs the function of homeostasis. (True)

Questions

1. What is meant by circulatory system ?
2. What are the components of blood circulatory system in humans ?
3. Name the mineral, which helps in formation of RBC's.
4. Give other name for blood platelets.
5. Name the groove, which demarcates two ventricles externally.
6. Name the thickest artery.
7. Name the blood vessel that brings oxygenated blood to the heart chamber.
8. Name the arteries, which supply blood to heart itself.
9. Give other term for bicuspid valve.
10. What is function of valves in circulatory system ?
11. Which chamber of heart receives oxygenated blood ?
12. Which chamber of heart pumps blood ?
13. Name the vein which brings blood to left atrium from lungs.
14. Name the major veins which pour blood into right atrium.
15. What is systole ?
16. What is diastole ?
17. Name the instrument used to measure blood pressure.
18. Name the instrument used to hear heart sounds.
19. What is the range of normal systolic and diastolic blood pressure ?
20. Name the instrument, which is inserted in the heart of the patient whose heart does not work normally ?
21. Define lymph.
22. How does lymph differ from blood ?
23. What are the functions of lymph ?
24. How does lymph form ?
25. Describe double circulation.

Very short answer type questions :

1. Name the blood-receiving chamber of heart.
2. What makes RBC's red ?
3. What is pulmonary circulation ?
4. Which chamber of heart has thickest wall ?
5. Name the larger veins that pour blood into right auricle.
6. Name the largest artery of our body.
7. Which chamber of heart receives oxygenated blood from lungs ?
8. Name the valve present between the :
(a) left auricle and left ventricle 
(b) right auricle and right ventricle

9. What is normal blood pressure ?
10. Name the artery that carry deoxygenated blood and the vein that carry oxygenated blood.
11. What is SA node ?
12. Which instrument can record electrical changes during heart beat ?
13. Name the thickest artery.
14. Name the part of the circulatory system that acts as filter for microorganisms.
15. Name the major circulation present in our body.
16. Give the technical term for the white vascular connective tissue.
17. What is the life span of human RBC's ?
18. Why is blood called river of life ?
19. Give the position of human heart ?
20. Why there is no backflow of blood from ventricles to auricles ?

Short answer type questions :

1. What are the components of the transport system in human beings ? What are the functions of these compound ?
2. Why is it necessary to separate oxygenated and deoxygenated blood in mammal and birds ?
3. Why is circulation in man known as "double circulation" ?
4. Write three differences between lymph and blood.
5. Why is heart beat rate equal to the arterial pulse rate ?
6. Is human circulatory system open or closed ? Why ?
7. In which direction does O₂ diffuse between a capillary and a cell ? Why does it diffuse in that direction?
8. What is the primary function of RBC's ?
9. Predict the effect on the heart if blood flow through the coronary artery is restricted or completely blocked.
10. Write two advantages of a closed circulatory system.
11. Point out three differences between artery and vein.
12. Why is SA node also called pacemaker ?
13. What is lymph ? What is its function in human body ?
14. Which part of the human heart is considered as pacemaker ? Why is it so called ?
15. What is the role of blood pressure in circulation ?
16. Give the difference between plasma and lymph.
17. What is the difference between plasma and serum ?
18. Give the difference between pulmonary artery and pulmonary vain.
19. Which blood cell in human blood carries haemoglobin ? What is its average life span ?
20. What is blood pressure ? How it is measured ?
21. Differentiate between systolic and diastolic pressure.
22. Give an account on different types of blood vessels.
23. Give the difference between pulmonary circulation and systemic circulation.

ANSWER KEY

Very Short Answer Question : 

1. Right auricle  2. Haemoglobin

3. In this, blood completes its circulation from right ventricle to left auricle through the lungs.

4. Left ventricle  5. Superior and inferior vena cava  6. Aorta

7. Left auricle 8. a. bicuspid value b. tricuspid valve  9. mm Hg

10. pulmonary artery, pulmonary vein  11. pacemaker of heart

12. Electrocardiograph  13. Aorta  14. Lymph nodes

15. Systemic circulation  16. Lymph 17. 120 days

18. because it transports the materials and help in survival of the organism.

19. In thoracic cavity between the lungs

20. due to presence of auriculo ventricular valves.

Long Answer Type Questions :

1. What would be the consequences of a deficiency of haemoglobin in our bodies ?

2. Explain how oxygenated blood from left ventricle is sent to all parts of the body and how deoxygenated blood enter into the right auricle.

3. Describe the double circulation in human beings with the help of diagrams. Why double circulation is necessary ?

4.

(a) Name the blood vessels labelled from 1 to 9.

(b) Which of these carry maximum oxyhaemoglobin ?

(c) Which of these contain highest concentration of amino acids and glucose soon after a meal ?

5. How does blood circulate between lungs and heart in human beings ? Give two functions of lymph in human beings.

6. (a) Name the blood vessel that brings oxygenated blood to the human heart.

(b) Which chamber of human heart receives deoxygenated blood ?

(c) Describe how deoxygenated blood from this chamber is sent to all parts of the body.

7. Draw a diagram of the vertical section of human heart to show the internal structure. Label any one of the heart chambers and any other five parts.

8. Name the blood vessel that brings deoxygenated blood to the human heart which chamber of the human heart receives deoxygenated blood ? Describe how deoxygenated blood from this chamber is sent to lungs for oxygenation.

9. Name the constituents of blood. Why are white blood corpuscles called 'Soldiers of the body' ?