The DAV Class 5 Science book Solutions and DAV Class 5 Science Chapter 1 Question Answer – My Body are essential study tools for DAV public school students in Class 5.
DAV Class 5 Science Chapter 1 Question Answer – My Body
DAV Class 5 Science Ch 1 Question Answer – My Body
Something To Know
A. Fill in the blanks.
Question 1. Wind pipe connects nose to the ______ in mammals.
Answer:
lungs
Question 2.
Of the two jaws, only the ______ jaw moves.
Answer:
lower
Question 3.
The backbone protects the ______
Answer:
spinal cord
Question 4.
Fish can feel waves with the help of their ______
Answer:
lateral line
Question 5.
A snake uses its ______ to touch and smell objects.
Answer:
tongue
Question 6.
Eye is connected to the brain by the ______ nerve.
Answer:
optic.
B. Match the following.
| Column I | Column II |
| 1. Elbow | (a) Longest bone |
| 2. Wrist | (b) Eight flat bones |
| 3. Hip | (c) Hinge joint |
| 4. Femur | (d) Ball and socket joint |
| 5. Skull | (e) Gliding joint |
Answer:
| Column I | Column II | |
| 1. Elbow | c | (a) Longest bone |
| 2. Wrist | e | (b) Eight flat bones |
| 3. Hip | d | (c) Hinge joint |
| 4. Femur | a | (d) Ball and socket joint |
| 5. Skull | b | (e) Gliding joint |
C. Tick (✓) the correct option.
1. The joint in the shoulder is an example of a
(a) Hinge joint
(b) Ball and socket joint
(c) Pivot joint
(d) Gliding joint
Ans.
(b) Ball and socket joint
2. The framework of bones, that protects our heart and lungs, is known as the
(a) Spinal cord
(b) Skull
(c) Ribcage
(d) Pivot joint
Ans.
(c) Rib cage
3. Light enters the eyes through the
(a) Pupil
(b) Cornea
(c) Retina
(d) Iris
Ans.
(a) Pupil
4. The part of the ear which helps in maintaining balance of our body is
(a) External ear
(b) Ear drum
(c) Middle ear
(d) Inner ear
Ans.
(d) Inner ear
D. Answer the following Questions in brief.
Question 1.
What is breathing?
Answer:
All living things take in oxygen and give out carbon dioxide. This process is called breathing.
Question 2.
How are fore limbs connected to the spine?
Answer:
The fore limbs are joined to the spine by the shoulder girdles and collar bone.
Question 3.
State the importance of the rib cage in our body.
Answer:
The rib cage protects the heart and lungs. These are important and delicate organs.
Question 4.
Name the main parts of the skeletal system.
Answer:
Following are the main parts of the skeletal system:
- Skull
- Backbone
- Rib Cage
- Limbs
Question 5.
State the role of inner ear in the process of hearing.
Answer:
The inner ear finally catches the sound waves and sends the message to the brain.
Question 6.
How does a snake detect the presence of an enemy or a prey?
Answer:
Snakes feel their surroundings with the help of their tongue.
E. Answer the following Question
Question 1.
Why do bones have joints?
Answer:
Joints serve following purposes:
(a) A joint keeps two bones together.
(b) A movable joint allows certain type of movement.
Question 2.
Why is our backbone made up of many small vertebrae instead of having one straight long bone?
Answer:
Had the backbone been made up of a single straight long bone, it would not have been possible to bend or twist our back. Many small vertebrae in the backbone allow flexibility in our back. Due to this, we are able to bend or twist our back. Hence, the backbone is made up of so many small vertebrae instead of having one straight long bone.
Question 3.
Why is bone marrow known as the factory for making blood cells?
Answer:
The blood cells are manufactured in the bone marrow. Due to this, bone marrow is known as the factory for making blood cells.
Question 4.
How does a ball and socket joint work?
Answer:
In a ball and socket joint, ball-like end of a bone fits in socket-like end of another bone. The bone with ball-like end can move in almost all directions. Due to this, all kinds of movement are possible in ball and socket joint. Due to this, we can move our arm up and down, sideways and in circular fashion.
Question 5.
Dogs and bats are also mammals like us. How does our sense of smell compare with that of a dog and our sense of hearing with that of a bat?
Answer:
Dogs have better sense of smell than us. Due to this, dogs are often used in detecting bombs and drugs. Similarly, bats have better sense of hearing than us. Due to this, bats can use ultrasound to detect their prey.
Question 6.
Do you breathe even when you are sleeping? Give reason for your answer.
Answer:
Breathing continues non-stop throughout the life. If breathing stops for more than two minute, it can result in death. Hence, we breathe even while sleeping.
Value Based Questions
Question 1.
State the values displayed by the students.
Answer:
The students showed sense of responsibility. They also showed teamwork, sincerity and organization.
Question 2.
Discuss how doing work in an organized and helpful way is useful for one and all.
Answer:
Doing work in an organized way ensures proper implementation of the planning. It also helps in better coordination among all the workers. Organized work helps in getting proper results.
Question 3.
Why did the teacher compare their work with the ‘Breathing System’?
Answer:
Different organs in the breathing system work like a team to achieve the main goal. Different students worked similarly to achieve a common task. Hence, the teacher compared their work with the ‘Breathing System’.
Something To Do
Question 1.
Try to make riddles about the functions of sense organs. One example is given below: I am an organ that helps you see, Coloured disc in white, can you recognize me!
Answer:
Eye
Solution: Do it yourself.
Question 2.
Find out how your external ear compares with that of the external ear of other mammals like cow, horse and elephant. What differences are there? Also find out about any other functions performed by the external ear of these animals.
Answer:
The external ears of cow, horse and elephant are much bigger than our external ears. Moreover, the external ears of these animals are movable. Many of these animals use their external ears to keep away the flies. Elephant’s ears also help in cooling down the body temperature.
Question 3.
There are many things in the house that have joints, e.g. door and scissors. Compare the joints of your body with different joints that you see in various appliances in your house. Record your results in the following table:
Answer:
| Name of the joint in our body | Joint in an appliance which is similar |
| Hinge joint | Hinge of the door |
| Ball and socket joint | Door knob |
| Pivot joint | Puppet with spring in neck, See-Saw |
| Gliding joint | Sliding door |
DAV Class 5 Science Chapter 1 Solutions – My Body
1. Oxygen is mixed in blood in which part of the breathing system?
(a) Nose
(b) Windpipe
(c) Lungs
(d) Diaphragm
Answer:
(c) Lungs
2. Optic nerve is present in which sense organ?
(a) Eye
(b) Ear
(c) Nose
(d) Skin
Answer:
(a) Eye
3. Which is the longest bone in the human body?
(a) Vertebra
(b) Femur
(c) Humerus
(d) Radio-ulna
Answer:
(b) Femur
4. Image is formed in which part of the eye?
(a) Cornea
(b) Iris
(c) Pupil
(d) Retina
Answer:
(d) Retina
5. How many bones are present in the middle ear?
(a) One
(b) Two
(c) Three
(d) Four
Answer:
(c) Three.
II. Fill in the blanks:
Question 1.
Breathing in is called ______
Answer:
inhalation
Question 2.
Breathing out is called ______
Answer:
exhalation
Question 3.
The ______ system gives shape to our body.
Answer:
skeletal
Question 4.
The ______ organs help us in sensing our environment.
Answer:
sense
Question 5.
The balance of our body is maintained by ______ ear.
Answer:
internal.
III. Write True/False:
1. Breathing is also called respiration.
2. There are four lungs in the human body.
3. Carbon dioxide is formed after respiration.
4. Lateral line helps a fish sensing waves in water.
5. Snakes smell through their nose.
Answer:
1. Breathing is also called respiration. (False)
2. There are four lungs in the human body. (False)
3. Carbon dioxide is formed after respiration. (True)
4. Lateral line helps a fish sensing waves in water. (True)
5. Snakes smell through their nose. (False)
IV. Define the Following:
Question l.
Respiration
Answer:
Production of energy with the help of oxygen inside the body is called respiration.
Question 2.
Organ
Answer:
Organs are special structures in our body. They perform specific functions.
Question 3.
Organ System
Answer:
A group of organs which work together for a particular function is called and organ system.
Question 4.
Inhalation
Answer:
The process of taking in air is called inhalation.
Question 5.
Exhalation
Answer:
The process of giving out air is called exhalation.
Question 6.
Joint
Answer:
The place where two bones are joined is called a joint.
V. Answer the Following Question in one Word:
Question 1.
Which gas mixes with blood inside the lungs?
Answer:
Oxygen
Question 2.
Which gas comes out of blood inside the lungs?
Answer:
Carbon dioxide
Question 3.
Which membrane separates the chest and abdomen?
Answer:
Diaphragm
Question 4.
Which organ connects the nasal chamber with lungs?
Answer:
Wind pipe
Question 5.
The white portion of eye is known by which name?
Answer:
Cornea
Question 6.
Which part of the human ear catches the sound waves from outside?
Answer:
External ear
Question 7.
Which organ is responsible for sense or heat and cold?
Answer:
Skin
Question 8.
The front of the tongue is sensitive to which taste?
Answer:
Sweet
Question 9.
Name an animal which uses ultrasound to detect its prey.
Answer:
Bat
Question 10.
Name an animal which uses its tongue to smell.
Answer:
Snake
VI. Answer the Following Questions
Question 1.
What do you understand by breathing?
Answer:
All living things take in oxygen and give out carbon dioxide. This process is called breathing.
Question 2.
Explain the structure of the breathing system.
Answer:
Following are the main parts of the breathing system:
Nose: There are two openings in the nose. These are called nasal openings. Air enters and exits through the nasal openings.
Wind Pipe: The nasal openings end up in a tube-like structure. This is called the wind pipe.
Lungs: The wind pipe is connected to two balloon-like structures. These are called lungs.
Diaphragm: This is a membrane¬like structure below the lungs. The diaphragm separates the chest cavity and the abdominal cavity.
Question 3.
Explain transportation of gases inside the lungs.
Answer:
When air enters the lungs, oxygen is taken up by the blood and, carbon dioxide is unloaded from it. This carbon dioxide is expelled out during exhalation. From the lungs, oxygen rich blood is supplied to different parts of the body.
Question 4.
What are the functions of the skeletal system?
Answer:
Functions of Skeletal System:
- It makes the framework of the body.
- It gives shape and support to the body.
- It protects the inner delicate organs.
Question 5.
Explain the structure of human eye.
Answer:
The eye has following main structures: Cornea: The outer covering of the eye is called cornea. Most of it can be seen as the white portion of the eye. Iris: The dark structure in front of the eye is called the iris.
Pupil: The small round black spot in the centre of the iris is called pupil. Pupil allows light to enter the eye. Lens: Lens is present behind the iris. This is a transparent structure and light passes through it.
Retina: Retina is present at the back of the eye. This works like a screen on which images are formed.
Optic Nerve: A bundle of nerves come out of the eye. This is called optic nerve. The optic nerve takes the message to the brain.
VII. Picture Based Question:
Observe the following figure and label as shown by A to F.
Answer:
A. Cornea
B. Retina
C. Pupil
D. Optic nerve
E. Iris
F. Lens
