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Vidaara.orgClass 5 · Mathematics
CodeVID-M5-WS
The Human Body: Working Systems — Practice Worksheet
Chapter: The Human Body: Working Systems
Topic: The Human Body: Working Systems
Maximum Marks: 25
Time: 30 minutes
Name: ____________________ Roll No.: __________ Date: ____________

General Instructions

  • All questions are compulsory.
  • Choose the correct option (A, B, C or D) for each question.
  • The answer key is at the end — try the paper first!
Section A — Multiple Choice (1 mark each) 15 × 1 = 15 marks
1.
Many cells of the same kind together form a…
  • A.Star
  • B.Stone
  • C.Tissue
  • D.River
2.
The watery liquid in the mouth that helps soften food is…
  • A.Tears
  • B.Blood
  • C.Sweat
  • D.Saliva
3.
Bones and muscles work together: muscles pull and bones…
  • A.Move at the joints
  • B.Make blood
  • C.Digest food
  • D.Breathe
4.
Air enters the body through the nose and travels down the…
  • A.Windpipe
  • B.Food pipe
  • C.Blood pipe
  • D.Bone
5.
The food pipe carries food from the mouth to the…
  • A.Stomach
  • B.Lungs
  • C.Heart
  • D.Brain
6.
The organs we breathe with are the…
  • A.Bones
  • B.Kidneys
  • C.Lungs
  • D.Eyes
7.
The organ that pumps blood around the body is the…
  • A.Heart
  • B.Lung
  • C.Brain
  • D.Stomach
8.
The organ that controls the whole body and helps us think is the…
  • A.Stomach
  • B.Brain
  • C.Lung
  • D.Heart
9.
The heart is mostly made of strong…
  • A.Muscle
  • B.Bone
  • C.Skin
  • D.Hair
10.
A body part that does a special job, like the heart or lungs, is an…
  • A.Island
  • B.Atom
  • C.Orbit
  • D.Organ
11.
The smallest living building blocks of the body are…
  • A.Bricks
  • B.Cells
  • C.Boxes
  • D.Beads
12.
The hard skull protects the soft…
  • A.Heart
  • B.Stomach
  • C.Brain
  • D.Liver
13.
We breathe in mainly to take in the gas…
  • A.Smoke
  • B.Oxygen
  • C.Steam
  • D.Dust
14.
Undigested food leaves the body as…
  • A.Saliva
  • B.Blood
  • C.Waste
  • D.Air
15.
Why does the heart beat faster when we exercise?
  • A.To cool down
  • B.To pump more blood and oxygen to muscles
  • C.To stop digestion
  • D.To sleep
Section B — Challenge / Olympiad (2 marks each) 5 × 2 = 10 marks
16.
In the lungs, oxygen passes into the blood and carbon dioxide passes out. This swap is called…
  • A.Evaporation
  • B.Digestion
  • C.Reflection
  • D.Exchange of gases
17.
Blood also carries waste like carbon dioxide to the lungs to be…
  • A.Stored forever
  • B.Eaten
  • C.Breathed out
  • D.Frozen
18.
Why is it important to chew food well?
  • A.It cleans teeth only
  • B.It tastes worse
  • C.It fills the stomach with air
  • D.Smaller pieces are easier to digest
19.
Which shows the right idea: organs are made of tissues, and tissues are made of…
  • A.Cells
  • B.Systems
  • C.Bones
  • D.Blood only
20.
When you touch something hot and pull back at once without thinking, this fast action is a…
  • A.Sneeze
  • B.Reflex
  • C.Yawn
  • D.Snore

Answer Key

Section A — Multiple Choice (1 mark each)
  1. (C) Tissue
  2. (D) Saliva
  3. (A) Move at the joints
  4. (A) Windpipe
  5. (A) Stomach
  6. (C) Lungs
  7. (A) Heart
  8. (B) Brain
  9. (A) Muscle
  10. (D) Organ
  11. (B) Cells
  12. (C) Brain
  13. (B) Oxygen
  14. (C) Waste
  15. (B) To pump more blood and oxygen to muscles
Section B — Challenge / Olympiad (2 marks each)
  1. (D) Exchange of gases
  2. (C) Breathed out
  3. (D) Smaller pieces are easier to digest
  4. (A) Cells
  5. (B) Reflex
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