EASY
7th West Bengal Board
IMPORTANT
Earn 100

Write down where is water stored in your body.

  1. Blood
  2. _____
  3. _____
  4. _____
  5. _____
  6. _____

Important Questions on Human Food

EASY
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 5 - Human Food>Exercise 40>Q 1

How does our body lose water? Write your answers in the space provided below.

  1. Sweat
  2. _____
  3. _____
  4. _____
EASY
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 5 - Human Food>Exercise 40>Q 1

Different organs of the human body and body fluids contain a sizeable amount of water.

Name of organ/body fluid Water content (%) by mass
Lungs 83
Brain 73
Liver 85
Bones 31
Muscle 75
Skin 64
Heart 73
Kidney 83
Blood 90
Saliva 95

Now arrange the organs/body fluids of the human body from the list according to their decreasing water content.

EASY
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 5 - Human Food>Exercise 41

Organs in a human body that contain water are given below. Now write in which form they are present there. Use the words given in the trove.

Word Trove: Slippery fluid, sweat, tear, blood, bile, saliva, urine, cerebrospinal fluid

 

Organs In which form does water occur
1. Mouth  
2. Liver  
3. Blood vessel/heart  
4. Urinary bladder  
5. Eye  
6. Skin  
7. Brain  
8. Bone joints  
MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 5 - Human Food>Exercise 42>Q 1
You have a wound in your leg. The doctor gave you medicine in the form of an injection. How will the medicine reach the wound? What is the function of water here?
MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 5 - Human Food>Exercise 42>Q 2
Chew a big biscuit. How is your mouth- dry or wet? Can you swallow the food? Try to speak. Can you talk easily? What will you do if your mouth feels dry? What is the function of water here?
MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 5 - Human Food>Exercise 42>Q 3
We sweat heavily in summer. How will you feel in front of a fan? What is the function of water here?
MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 5 - Human Food>Exercise 42>Q 4
Which fluid is found in our eyes? What will happen if an insect enters the eye? Why does it happen? What is the function of water here?
MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 5 - Human Food>Exercise 42>Q 5
Breathe heavily in front of a mirror. Do you see the mark on the mirror? Where does this vapour come from? So what are the function of water?