OUR BODY (CLASS-3)

 Hello students!!

This article discusses the topic from Science- 

OUR BODY for Class-3

Here, we will discuss the topic in the form of questions and answers which will make you understand and revise what you have learnt in this topic.

Q1. What is your body made up of?        Organ Systems

a) Organ Systems

b) Exercise

Q2. Fill in the blanks:

a) Our body is made up of many small parts called cells .

b)  Cells are the building blocks of the body.

c)  Tissue is made up of many similar cells.

d)  Organ is made up of different tissues.

e) Group of organs forms an organ system .

f) Organism is made up of different organ systems.

g) Skeletal system gives shape and form to our body.

h) There are 206 bones in our body.

i) There are 600 muscles in our body.

j) Joints connect the bones and help us to move.

k) Face muscles move to make us talk, eat, smile .

l) Arm muscles shorten and lengthen to move the arm up and down.

m) An organ system has many organs to work together.

n) All muscles together form the muscular system .

o) The food gets mixed thoroughly in the stomach .

p) We need to breathe in air to live.

q) The air that we breathe in is called inhaled air .

r) The air goes down the wind pipe and reaches the lungs .

s) Blood vessels branch off and go to all parts of the body.

t) Heart pumps blood to all organs of the body.

u) Excretory system throws body waste such as sweat and urine .

Q3. Who am I?

a) I protect the brain. Skull

b) I make up the skeletal system in the body. Muscles

c) I protect the lungs and the heart. Ribs

d) I protect the inner body parts from getting injured. Bones

e) I protect the spinal cord. Backbone

f) I help to move different parts of the body. Joints

g) I take in food. Mouth

h) I pass down the food. Food Pipe

i) I throw out the undigested food. Anus

Q4. Give one word for the following:-

a) It absorbs what is needed from the food. Intestine

b) It makes and releases the juice which helps to change food into simpler substances. Liver

c) It shortens and lengthens to move legs. Leg Muscles

d) It is impure and contain less oxygen and more carbon-dioxide. Exhaled Air

e) It expands when air reaches it. Lungs

f) It gives orders to different parts of body. Brain

g) It connects all nerves of body to the brain. Spinal cord

h) Body cannot work without me. Heart

i) It carries blood through thin tubes to all body parts. Blood vessels

j) A good medicine for a healthy heart. Bark of Arjun Tree

Q4. Match the following:-

                                       

Q5. Answer the following:-
  1. Define - a) cell        b) tissue       c) digestion              d) Organ             e) Organ system                                f) Organism 
  2.  Name the organs that form our- a) Digestive system                         b) Circulatory system           c) Skeletal system         d) Muscular system      e) Respiratory system       f) Excretory system         g) Nervous system

      3. What do the nerves do for the body?

      4. Why we should exercise regularly?

      5. What is the function of excretory system?

      6. What are the important organ systems of our body?

      7. Why does our finger bleed when it gets cut? 

      8. Why is it important to keep our lungs strong and healthy?

      9. Can we move our body only with the help of bones?



Note: This is written by a CBSE School Teacher.


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