16 - Blood Circulatory System in Human Body

In this post, you can check the solutions to the exercises of Blood Circulatory System in Human Body of Oasis School Science Grade 10 by Jayananda Kapadi.

Group A

1. What is blood circulatory system?
Answer: Blood circulatory system is the join combination of heart, blood and blood vessels that transport various substances in the human body.

2. What is blood?
Answer: Blood is a red-colorred connective tissue consisting of blood cells and plasma.

3. What are the components of blood?
Answer: The components of blood are:
  • Plasma
  • Blood cells: Erythrocytes, Leucocytes, and Thrombocytes
4. What is plasma?
Answer: Plasma is blood devoid of blood cells.

5. What is haemoglobin? Write down its function.
Answer; Haemoglobin is a red-colored respiratory pigment found in red blood cells.
Its function is to help in exchange of gases.

6. What is blood cancer?
Answer: Blood cancer is a diseased condition of human body caused due to increase in number of White Blood Cells above the normal level (>11000).


7. Write down the functions of blood related to transportation.
Answer: The functions of blood related to transportation are:
  • Supply oxygen to all necessary parts of the body
  • Carry diffused carbon dioxide to the lungs for excretion.
8. Name the blood vessels that carry pure blood to the left auricle and impure blood to the right auricle of the heart.
Answer: The blood vessel that carry pure blood to the left auricle is Pulmonary Vein and the blood vessel that carries impure blood to the right auricle is Superior and Inferior Vena cava.

9. Where are aortic valve and pulmonic valve located?
Answer: Aortic valve is located in between left ventricle and aorta; and pulmonic valve is located in the between right ventricle and pulmonary artery.

10. State the functions of aortic valve and pulmonic valve.
Answer: Aortic valve prevents the backflow of pure blood from the aorta into the left ventricle. Similarly, pulmonic valve guards the backflow of impure blood from the pulmonary artery into the right ventricle.

11. Name the blood vessels that take part in blood circulation.
Answer: The blood vessels that take part in blood circulation are:
  • Arteries
  • Veins
  • Capillaries
12. What is blood circulation?
Answer: Blood circulation is the transport of pure blood from the heart to the entire body and back into the heart in the form of impure blood. 

13. What is systemic circulation?
Answer: The circulation of blood form the left ventricle of the heart into the right auricle of the heart without reaching the lungs is called systemic circulation.


14. What is blood pressure?
Answer: Blood pressure is the measure of pressure exerted by the pure blood flowing in the arteries.

15. Define diastolic blood pressure.
Answer: Diastolic blood pressure is defined as the pressure of the blood inside the arteries when the ventricles of the heart relax.

16. What is the blood pressure of a healthy young body?
Answer: The blood pressure of a healthy young body is 120/80 mm of Hg.

17. What are the factors that affect blood pressure.
Answer: Age, stress, food, weight etc. are the factors that affect blood pressure.

18. Name the device which is used for measuring blood pressure.
Answer; The name of the device which is used for measuring blood pressure is Sphygmomanometer.

19. What is diabetes?
Answer: Diabetes is a diseased condition of human body caused due to imbalance of sugar in the blood.

20. What is uric acid?
Answer: Uric acid is a compound of carbon, nitrogen, oxygen, and hydrogen with the formula C$_5$H$_4$N$_4$O$_3$. [This answer is taken from Oasis School Science Book page number 300]


21. Which instrument is used to take the reading of the blood pressure?
Answer: Sphygmomanometer is the instrument which is used to take the reading of the blood pressure.

22. Define heart beat.
Answer: Heart beat is defined as the continuous rhythmic beat of the heart caused due to contraction and relaxation of the muscles of the heart. 

23. Under what condition does heart beat increase?
Answer: Heart beat increases when we face moments such as: fear, fright, fight, etc.

24. Which blood cells number is less than average in a person suffering from anaemia?
Answer: In a person suffering from anaemia, the count of red blood cells is less than average.

25. Name the blood vessel which carries blood from heart to lungs.
Answer: Pulmonary Artery

26. Which blood vessel carries impure blood from heart to lungs? Write.
Answer: Pulmonary Artery

27. Give the name of blood vessel which supplies pure blood from lungs to heart.
Answer: Pulmonary Vein


Group B


About this book:

Oasis School Science Grade 10
Author: Jayananda Kapadi
Editor: Dr. Rameshwar Adhikari

About Oasis Publication:

Oasis Publication (P) Ltd.
Anamnagar, Kathmandu, Nepal
Phone: 0977-01-4224004