AP 5th EVS Our Body – Our Organ Systems TextBook Answers and Solutions. APSCERT 5th Class EVS Unit 4, Textbook Exercise Answers. APSCERT Class 5, EVS 4th Unit Our Body Our Organ Systems Text Book Exercises Answers.
4. Our Body – Our Organ Systems (Textbook Answers)
📘 Page 220 — Observe the picture and answer
- What is the teacher showing in the picture?
The teacher is showing a chart of the human body with the internal organs like the brain, lungs, and stomach. - Can you say the names of some organs of our body?
Brain, heart, lungs, stomach, liver, kidneys, eyes, ears, hands, legs. - What are the uses of organs?
Organs help our body to perform different life functions, such as breathing, digesting food, pumping blood, thinking, seeing, and moving.
📗 Page 224 — Let us discuss (Getting Energy)
- Which part of our body helps to digest the food?
The stomach and small intestine (digestive system) help to digest the food. - Why did Rohit get tired after dancing?
Rohit got tired because his body used up a lot of energy while dancing. - How did eating bananas help Rohit?
Eating bananas gave Rohit energy, which helped him continue dancing without feeling tired. - What would happen if Rohit did not eat anything and continued dancing? Why?
If Rohit had not eaten anything and continued dancing, he would have felt weaker and more tired, and may even have fainted, because his body would not have enough energy to keep moving.
📙 Page 228 — Activity: Functions of the Digestive System
| S.No. | Parts | Function |
|---|---|---|
| 1. | Mouth | Chews the food into smaller pieces and mixes it with saliva. |
| 2. | Oesophagus | Carries the softened food from the mouth to the stomach. |
| 3. | Stomach | Mixes food with digestive juices and breaks it down further. |
| 4. | Small Intestine | Digests food further and absorbs the nutrients into the blood. |
| 5. | Large Intestine | Absorbs water from the undigested food. |
| 6. | Rectum | Stores the waste material temporarily. |
| 7. | Anus | Releases the waste material out of the body. |
📕 Page 230 — Look at the given picture (Stethoscope)
- What do you observe in the picture?
A doctor is examining a boy using an instrument placed on his chest. - What is the doctor doing?
The doctor is measuring/listening to the boy's heartbeat. - What do you call the apparatus with which the doctor is testing the patient?
It is called a stethoscope.
How is the sound? Where does the sound come from? Why?
The sound is a rhythmic 'lub-dub' sound. It comes from the heart because of the opening and closing of the heart valves as it pumps blood.
📔 Page 234 — Let us discuss (Circulatory system) & Complete the table
- Which blood vessels transport the blood from the heart to all parts of the body?
Arteries transport blood from the heart to all parts of the body. - Which blood vessels transport the blood from the body parts to the heart?
Veins transport blood from the body parts back to the heart. - What is the instrument used by the doctor to measure heartbeat?
A stethoscope is used to measure the heartbeat.
Complete the following table:
| S.No | Who am I | What do I do |
|---|---|---|
| 1. | Heart | I pump blood to all parts of the body, working like a motor pump. |
| 2. | Blood Vessels | I (arteries and veins) carry blood throughout the body — arteries carry blood away from the heart, and veins bring blood back to the heart. |
| 3. | Blood | I carry oxygen and nutrients to all parts of the body and remove waste materials like carbon dioxide. |
📓 Page 236 — Squirrel's Question (Nervous System)
While walking along the road, we hear the sound of a bus horn. We immediately move aside. How are we able to move immediately after listening to the sound?
Our ears (a sensory organ) detect the sound of the horn and send this message through the nerves to the brain. The brain quickly identifies the message as a danger signal and sends a message back through the nerves to our muscles, making us move aside immediately. This whole process happens because of the effective and fast functioning of the nervous system.
🌟 Page 240 — Improve your Learning
- Name the organ systems in the human body.
Skeletal system, Digestive system, Respiratory system, Circulatory system, Excretory system, and Nervous system. - Write the name of the organ that pumps blood.
The heart pumps blood. - Which organ system is responsible for the movement of our body?
The skeletal system (along with muscles) is responsible for the movement of our body. - What is the human body's nervous system primarily responsible for?
Answer: (D) Transmitting signals - How does the respiratory system help our body?
The respiratory system takes in oxygen through breathing, which helps release energy from the food inside our cells, and it removes carbon dioxide waste gas from our body. - Why do we need the circulatory system?
We need the circulatory system because it transports oxygen and nutrients to all parts of the body through the blood, and removes waste products like carbon dioxide, keeping us healthy. - Explain why all organ systems must work together.
Each organ system performs a specific and different function, but no single system can keep the body alive and healthy on its own. All organ systems must work together, just like the parts of a machine, so that our body functions properly. - Which organ system is shown in the above picture (boy eating food → stomach/intestines) and what is its main function?
Answer: (B) Digestive system – breaking down food - After eating food, what happens to the food inside your body? Name the system involved.
The digestive system is involved. The food is chewed in the mouth, travels through the oesophagus to the stomach, where it mixes with digestive juices. It then passes to the small intestine, where digestion is completed and nutrients are absorbed into the blood, while the leftover waste is passed to the large intestine and finally removed from the body. - Place your hand on your chest and feel your heartbeat. Which organ are you feeling and what is its function?
We are feeling the heart. Its function is to pump blood to all parts of the body through blood vessels, supplying oxygen and nutrients to the cells. - Riya runs for 5 minutes and notices that her breathing becomes faster and her heart beats quicker. Which two organ systems are mainly working harder?
Answer: (C) Respiratory and circulatory systems - Match the following: Organ → Organ System
i. Heart → B (Circulatory system)
ii. Lungs → C (Respiratory system)
iii. Stomach → D (Digestive system)
iv. Brain → A (Nervous system) - Compare the digestive system and respiratory system. Write one difference.
The digestive system breaks down the food we eat into nutrients that are absorbed into the blood, while the respiratory system takes in oxygen from the air and removes carbon dioxide from the body. - What may happen if one organ system does not work properly? Explain with one example.
If one organ system does not work properly, it affects the working of the whole body since all systems depend on each other. For example, if the respiratory system does not work properly, our cells will not get enough oxygen, and we will feel weak and unable to do any activity. - Is it important to eat healthy food for the proper working of organ systems? Why?
Yes, it is important to eat healthy food because it provides the nutrients and energy that all our organ systems need to function properly and keep our body healthy. - Do you agree that our body is an amazing machine? Give one reason.
Yes, our body is an amazing machine because all its different organ systems work together in perfect coordination, without our even thinking about it, to keep us alive, healthy, and active. - Write two sentences appreciating how different organ systems work together.
Our digestive, respiratory, and circulatory systems work together so that the food we eat is turned into energy and delivered to every cell of our body. The excretory and nervous systems then work together to clean our body of waste and to control and coordinate all these activities smoothly. - Prepare a short slogan on 'Taking care of our body'.
"Healthy Food, Regular Play — Keeps Our Organs Fit All Day!"
