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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.
The food pipe carries food from the mouth to the…
  • A.Stomach
  • B.Lungs
  • C.Heart
  • D.Brain
2.
The hard skull protects the soft…
  • A.Heart
  • B.Stomach
  • C.Brain
  • D.Liver
3.
A body part that does a special job, like the heart or lungs, is an…
  • A.Island
  • B.Atom
  • C.Orbit
  • D.Organ
4.
The heart is mostly made of strong…
  • A.Muscle
  • B.Bone
  • C.Skin
  • D.Hair
5.
Why do we say the body is like a team?
  • A.It plays cricket
  • B.Each system does its part for the whole body
  • C.It wears a jersey
  • D.It has a captain only
6.
A group of body parts that work together to do a job is called a…
  • A.System
  • B.Toy
  • C.Game
  • D.Song
7.
We breathe in mainly to take in the gas…
  • A.Smoke
  • B.Oxygen
  • C.Steam
  • D.Dust
8.
Air enters the body through the nose and travels down the…
  • A.Windpipe
  • B.Food pipe
  • C.Blood pipe
  • D.Bone
9.
Teeth help in digestion by…
  • A.Smelling
  • B.Tasting only
  • C.Chewing and breaking food
  • D.Pumping blood
10.
The beating you feel at your wrist is your…
  • A.Yawn
  • B.Sneeze
  • C.Cough
  • D.Pulse
11.
We breathe faster after running because the body needs more…
  • A.Water only
  • B.Sleep
  • C.Oxygen for energy
  • D.Salt
12.
Blood flows through tubes in the body called…
  • A.Wind pipes
  • B.Food pipes
  • C.Blood vessels
  • D.Bones
13.
Bones and muscles work together: muscles pull and bones…
  • A.Move at the joints
  • B.Make blood
  • C.Digest food
  • D.Breathe
14.
Digestion of food begins in the…
  • A.Stomach
  • B.Mouth
  • C.Heart
  • D.Lungs
15.
The framework of bones that gives the body its shape is the…
  • A.Blood
  • B.Skin
  • C.Muscle
  • D.Skeleton
Section B — Challenge / Olympiad (2 marks each) 5 × 2 = 10 marks
16.
A sheet of muscle below the lungs that helps us breathe in and out is the…
  • A.Rib only
  • B.Skull
  • C.Diaphragm
  • D.Heart
17.
Digestion is important because it changes food into a form the body can…
  • A.Absorb and use for energy
  • B.Throw away at once
  • C.See
  • D.Hear
18.
If one system, such as the lungs, stops working, the body suffers because the systems are…
  • A.Not important
  • B.Completely separate
  • C.Dependent on each other
  • D.Just for show
19.
Blood also carries waste like carbon dioxide to the lungs to be…
  • A.Stored forever
  • B.Eaten
  • C.Breathed out
  • D.Frozen
20.
Muscles often work in pairs: as one pulls (contracts), the other…
  • A.Relaxes
  • B.Disappears
  • C.Breaks
  • D.Grows hair

Answer Key

Section A — Multiple Choice (1 mark each)
  1. (A) Stomach
  2. (C) Brain
  3. (D) Organ
  4. (A) Muscle
  5. (B) Each system does its part for the whole body
  6. (A) System
  7. (B) Oxygen
  8. (A) Windpipe
  9. (C) Chewing and breaking food
  10. (D) Pulse
  11. (C) Oxygen for energy
  12. (C) Blood vessels
  13. (A) Move at the joints
  14. (B) Mouth
  15. (D) Skeleton
Section B — Challenge / Olympiad (2 marks each)
  1. (C) Diaphragm
  2. (A) Absorb and use for energy
  3. (C) Dependent on each other
  4. (C) Breathed out
  5. (A) Relaxes
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