Find out my partner. Group 'A' Group 'B' 1. Heartbeats a. 350 ml 2. RBC b. 7.4 3. WBC c. 37 ° C 4. Blood donation d. 72 5. Normal body temperature e. 50-60 lakh/ mm 3 6. pH of oxygenated blood f. 5000-6000 per mm 3

1. Heartbeats- d. 72 Pulse is measured by counting the number of times our heart beats in one minute. On an average, our heart contracts 72 times in one minute. Thus, 72 is the average heart rate of an adult human. 2. RBC- e. 50-60 lakh/mm 3 RBCs are blood cells suspended in the plasma. The RBCs do not have a nucleus and mitochondria. RBCs have red-coloured haemoglobin pigment that helps in carrying respiratory gases. The average number of RBC in blood is 50-60 lakh/ mm 3 . 3. WBC- f. 5000-6000 per mm 3 WBCs are large, nucleated and colourless cells. WBCs perform various functions, the main function being maintaining immunity. The average number of RBC in blood is 5000-6000 per mm 3 . 4. Blood donation- a. 350 ml Blood donation is a process in which the donor provides whole blood, red blood cells, plasma, or platelets. The volume of blood donated should not exceed 13% of blood volume. A donor should weigh at least 45 kg to donate 350 ml of blood. 5. Normal body temperature- c. 37 ° C Human beings are endothermic, i.e., their body maintains a fixed temperature irrespective of the changes in the surroundings. Body temperature of human beings is maintained constant at 37 ° C. 6. pH of oxygenated blood- b. 7.4 Blood is the red-coloured fluid connective tissue that flows through the blood vessels. The pH of oxygenated blood is 7.4. Blood is slightly alkaline in nature. Group 'A' Group 'B' 1. Heartbeats d. 72 2. RBC e. 50-60 lakh/mm 3 3. WBC f. 5000-6000 per mm 3 4. Blood donation a. 350 ml 5. Normal body temperature c. 37 ° C 6. pH of oxygenated blood b. 7.4

E M B I B E

General Science>Chapter 11 - Human Body and Organ System>Can you tell?>Q 2

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8th Maharashtra Board

IMPORTANT

Earn 100

Which life processes occur continuously in our body?

Important Questions on Human Body and Organ System

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8th Maharashtra Board

IMPORTANT

General Science>Chapter 11 - Human Body and Organ System>Can you recall?

Which different organs perform the function of breathing in the body of animals? (Write w.r.t mammals)

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8th Maharashtra Board

IMPORTANT

General Science>Chapter 11 - Human Body and Organ System>Can you tell?>Q 2

One should not talk while eating. Why is it so?

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8th Maharashtra Board

IMPORTANT

General Science>Chapter 11 - Human Body and Organ System>Can you recall?>Q 1

What is meant by blood circulation?

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8th Maharashtra Board

IMPORTANT

General Science>Chapter 11 - Human Body and Organ System>Can you recall?>Q 2

Which organs are present in blood circulatory system?

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8th Maharashtra Board

IMPORTANT

General Science>Chapter 11 - Human Body and Organ System>Exercise 6

Why the veins are provided with valves? Why the arteries have thick wall?

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8th Maharashtra Board

IMPORTANT

General Science>Chapter 11 - Human Body and Organ System>Can you tell?>Q 1

We can feel the pulse behind the ears and near the heel of the foot. How these pulses occur?

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8th Maharashtra Board

IMPORTANT

General Science>Chapter 11 - Human Body and Organ System>Can you tell?>Q 2

What flows out when we have an injury?

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8th Maharashtra Board

IMPORTANT

General Science>Chapter 11 - Human Body and Organ System>Exercises>Q 1

Find out my partner.

Group 'A'	Group 'B'
1. Heartbeats	a. 350 ml
2. RBC	b. 7.4
3. WBC	c. 37 $°$ C
4. Blood donation	d. 72
5. Normal body temperature	e. 50-60 lakh/ mm³
6. pH of oxygenated blood	f. 5000-6000 per mm³

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