Worksheet on Organ Systems in Our Body - Class 3 Notes & Olympiad Questions

Questions with Explanations for Class 3 on Organ Systems in Our Body

1. X is a carnivorous animal. It tears meat with its sharp pointed teeth. Identify X and the kind of teeth that helps it tear the meat.

a) X is a tiger with sharp incisors.
b) X is a giraffe with sharp incisors.
c) X is a lion with sharp canines.
d) X is a tiger with sharp molars.

Answer: c) Carnivorous animals such as lions and tigers typically have sharp pointed canines that are well-suited for tearing and shredding meat.

2. In a classroom discussion, two students made statements about an organ in the human body called 'X'. Read the statements and identify organ X.

Sophia: It helps in breaking down food and absorbing nutrients.
Alex: It is a J-shaped organ.

a) organ-system3-q2a
b) organ-system3-q2b
c) organ-system3-q2c
d) organ-system3-q2d

Answer: b) Stomach is a J-shaped organ that helps in breaking down food and absorbing nutrients.

3. Unscramble the given alphabet to get the name of a sense organ that will help you differentiate between the taste of dishes shown in the picture:

organ-system3-q3

a) U N O T G E
b) R A S E
c) E Y S E
d) O N S E

Answer: a) Tongue helps us taste different flavours of food like sweet, sour and salty.

4. Sara ran a marathon and felt her heart pounding and her breathing getting faster. Spot the two organ systems that helped her during the marathon.

a) Respiratory system, Skeletal system
b) Circulatory system, Muscular system
c) Digestive system, Nervous system
d) Excretory system, Digestive system

Answer: b) The circulatory system supplies oxygen and nutrients to the muscles during exercise, while the muscular system generates the force required for running.

5. Match the following organs with their respective organ systems.

organ-system3-q5

a) 1:A, 2:B, 3:C, 4:D
b) 1:B, 2:A, 3:D, 4:C
c) 1:C, 2:A, 3:B, 4:D
d) 1:A, 2:C, 3:D, 4:B

Answer: d) Heart: Circulatory System
Bone: Skeletal System
Liver: Digestive System
Lungs: Respiratory System

FAQs on Organ Systems in Our Body

1. What is Organ System?

An organ system is a group of organs that combine to perform certain functions in our bodies. These systems ensure that our bodies function properly and remain healthy.

2. What happens when an organ system isn't working properly?

When an organ system fails, it can cause health complications.

3. What's the role of the nervous system in Human body?

The nervous system controls all of our bodily functions, allowing us to think, move, and feel. The brain, spinal cord, and nerves are all part of it.

4. What is the role of Immune system in Human Body?

The immune system protects from diseases and infections. It protects us against dangerous bacteria that can make us sick.

5. How many organ systems are there in the human body?

The circulatory, digestive, respiratory, and neurological systems etc. are among the 11 primary organ systems in the human body.

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