8th Science, Exercise, 11. Human Body and Organ System

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1. The weight of our heart is about ... grams.

2. ... live for about 100-127 days.

3. About ... ml of blood is collected from a person during donation

4. In the case of a healthy person, there are ... beats of heart per minute.

5. A ... is present on either side of the heart in the thoracic cavity.

6. Define -organ system.

7. The heart consists of four chambers. Upper chambers are called as ... and lower chambers as ventricles.

8. ... is present between the thoracic cavity and abdominal cavity.

9. What are the four main human blood groups?

10. Blood group ... was discovered by Decastello and Sturli in 1902.

11. Define blood circulation.

12. Lungs are made up of many small compartments, called ........ .

13. Which organ systems are present in the human body?

14. ... is fluid connective tissue.

15. Define internal respiration.

16. 5000-10,000 ... are present per mm³ of blood.

17. The size of our heart is equal to one's own .... .

18. Which organs are present in the blood circulatory system?

19. Consecutive single contraction and relaxation of the heart constitutes a single ... .

20. Capillaries unite together to form the vessels of greater diameter, called ... .

21. Define blood transfusion.

22. A, B, and ... blood groups were discovered by Carl Landsteiner in 1900.

23. The oxygenated blood is deep red colored, salty in taste, and its pH is ... .

24. The heart pumps about ... ml of blood during each beat.

25. Define cellular respiration.

26. Blood cells appear red due to ... .

27. Define 'systolic pressure.'

28. Write the chemical reaction of cellular respiration.

29. Blood pressure is measured with the help of a ... .

30. Normal diastolic blood pressure in humans is ... mm of Hg.

31. Write 5 types of WBCs.

32. Thus, in all, the heart consists of ... chambers.

33. Explain external respiration.

34. 2.5 - 4 lakh ... are present per mm³ of blood.

35. Define thermoregulation.

36. ... participate in the blood clotting process.

37. 1st ... is observed as National Voluntary Blood Donation Day.

38. ... —Distributes the water all over the body.

39. Blood pressure of a healthy person is about 120/80 mm to 139/89 mm of ... .

40. The branch of medical science that deals with the study of blood, hematopoietic organs, and blood diseases is called hematology.

41. In plasma, which inorganic ions are present? 

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1. A healthy person of age more than 18 years can donate blood ... times a year.
2. The person with the '...' blood group can receive the blood from the person with any other blood group.
3. WbCs & RBCs are produced in ... .
4. 50 - 60 lakh ... are present in each cubic millimeter of blood.
5. Two types of sounds are heard during a heartbeat. One is described as 'lubb,' and the other as '... .'
6. Arteries gradually branch out with a decrease in their diameter as they spread in the body and finally form fine hair-like vessels called ... .
7. William Harvey discovered the working mechanism of valves of the ... .
8. Maximum area of the thoracic cavity is occupied by ...... .
9. Fibrinogen & ... help in the blood clotting process.
10. ... cells attack the pathogens entering our body.
11. Name any two nitrogenous wastes of the human body.
12. A person of the blood group '...' can donate the blood to the person having any other blood group

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🎷 The difference between arteries and veins is given below in the form of points.

Arteries:

A. Blood vessels that carry the blood away from the heart are called ... . 

B. Except for ... arteries, all arteries carry oxygenated blood. 

C. ... are deeply located in the body, and their walls are thick. 

D. Arteries do not have ... .

Veins: 

A. Vessels carrying the blood towards the heart from various parts of the body are called ... . 

B. All veins except the ... carrying blood from lungs transport oxygenated blood.

C. Most of the veins are ... located in the body. 

D. Walls of veins are thin, and veins are provided with ... .

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The phrase "called as" is considered an Indianism and is not standard in English; the correct phrasing is "called" or "called something." In standard English, "called" is a transitive verb, meaning it takes a direct object without needing "as" after it, while "as" is used in different contexts like introducing a list with "such as" or acting as a subordinating conjunction.