WORKSHEET - 1
Concept : Organs in our body & the skeletal system
I. Rewrite the following words two times.
| Organs | Internal organs | External organs | Machine | Together |
|---|---|---|---|---|
| Organs Organs |
Internal organs Internal organs |
External organs External organs |
Machine Machine |
Together Together |
| Structures | Rib cage | Backbone | Cartilage | Skeleton |
| Structures Structures |
Rib cage Rib cage |
Backbone Backbone |
Cartilage Cartilage |
Skeleton Skeleton |
II. True (T) or False (F).
| Statement | Ans |
|---|---|
| 1. Organs are classified as internal and external based on their functionality. | False |
| 2. Some organs in our body do not have any functionality. They are just for the beauty. | False |
| 3. Only external organs work together to perform the body functions. | False |
| 4. The skeletal system supports our body movements with the support of muscles. | True |
| 5. The protection of all body parts is an important function of bones. | False |
III. Read the following paragraph and answer the given questions.
Our body has different organs that work together to keep us alive and healthy, just like the parts of a machine. Some organs are external organs because they are visible from outside, such as the head, hands, and legs. These organs help us see, hold things, walk, and do many activities. Some organs are internal organs because they are inside our body and cannot be seen directly from outside, like the brain, heart, lungs, liver, kidneys, etc.
The brain controls our actions, the heart pumps blood, the lungs help us breathe, and the kidneys remove waste. When all organs work properly and together, then our body will stay fit and healthy.
Now answer the following questions.
-
Why is the brain important?
The brain controls our actions and helps us think and respond to our surroundings.
-
Explain one activity that denotes the collective work of both internal and external organs.
Walking is one such activity. The brain controls the action, while the legs, muscles and bones help us move.
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Why is it important to take care of both internal and external organs?
Both internal and external organs perform important functions. Taking care of them helps our body remain fit and healthy.
-
When will we stay fit and healthy?
We will stay fit and healthy when all our organs work properly and together.
IV. Multiple Choice Questions.
-
Which option correctly matches an organ with its category?
Answer: B) Lung - Internal organ
-
A student lists: heart, kidney, leg, liver. Which classification is correct?
Answer: C) Heart, kidney and liver are internal; leg is external
-
How do bones help in body movements?
Answer: C) Bones work together with muscles and joints to help movement
-
What is the main role of the rib cage?
Answer: B) It protects the heart and lungs
V. Answer the following questions in two or three sentences.
-
Name the organ systems in the human body.
The main organ systems include the skeletal, digestive, respiratory, circulatory, excretory and nervous systems.
-
Which organ system is responsible for movement of our body?
The skeletal system works with muscles and joints to help in the movement of our body.
-
As our bones grow longer, what happens to our body? Explain.
As our bones grow longer, our body grows in height and size. This growth helps us develop from childhood towards adulthood.
VI. Answer the following questions in four or five sentences.
-
How is an internal organ different from an external organ? Explain.
An internal organ is present inside our body and cannot be seen directly from outside. Examples include the brain, heart, lungs, liver and kidneys. An external organ is visible from outside. Examples include the head, hands and legs. Both internal and external organs perform important functions.
-
Explain the following four important functions of the human skeletal system.
The skeletal system supports our body and gives it strength. It protects important organs such as the brain, heart and lungs. Bones work with muscles and joints to help us move. The skeleton also gives shape and structure to our body.
WORKSHEET - 2
Concept : Digestive system and getting energy.
I. Rewrite the following words two times.
| Stomach | Digestion | Nutrients | Absorbable | Enzymes |
|---|---|---|---|---|
| Stomach Stomach |
Digestion Digestion |
Nutrients Nutrients |
Absorbable Absorbable |
Enzymes Enzymes |
| Saliva | Oesophagus | Intestine | Rectum | Anus |
| Saliva Saliva |
Oesophagus Oesophagus |
Intestine Intestine |
Rectum Rectum |
Anus Anus |
II. True (T) or False (F).
| Statement | Ans |
|---|---|
| 1. The digestive system helps our body break down food into complex substances. | False |
| 2. The mouth is the first part of the digestive system and small intestine is the last one. | False |
| 3. Nutrients from digested food are absorbed mainly in the small intestine. | True |
| 4. The large intestine helps absorb water and prepare waste for elimination. | True |
III. Read the following conversation and answer the given questions.
Vikram : Tanuja, have you ever thought about how our body gets energy from the food we eat?
Tanuja : Yes, Vikram! It's because of our digestive system. Digestion actually starts in the mouth.
Vikram : What happens there first?
Tanuja : Our teeth chew the food, and saliva softens it so it can be swallowed easily.
Vikram : Then the food goes straight to the stomach, right?
Tanuja : Yes, it moves through the food pipe to the stomach, where it is mixed and broken down further.
Vikram : Where does the body get energy from the food?
Tanuja : In the small intestine, nutrients are absorbed into the blood to give us energy.
Vikram : And what happens to the waste?
Tanuja : The large intestine absorbs water and forms waste. Eating a balanced diet keeps our digestive system healthy and smoothly!
-
What happens to the food we eat in the mouth?
Our teeth chew the food and saliva softens it. This makes the food easier to swallow.
-
What problems might occur if nutrients are not absorbed properly in the small intestine?
The body may not get enough nutrients and energy. This can lead to weakness and poor health.
-
How would a lack of a balanced diet affect the working of the digestive system?
A lack of a balanced diet may affect digestion and the proper functioning of the digestive system. It may also prevent the body from getting the nutrients it needs.
IV. Multiple Choice Questions.
-
Where are the nutrients absorbed into the blood?
Answer: D) Small intestine
-
Which organ absorbs water from undigested food?
Answer: C) Large intestine
-
The food pipe is also known as
Answer: B) Oesophagus
-
What is the main duty of the stomach?
Answer: C) Mix and break down food
V. Answer the following questions in two or three sentences.
-
Write the path way of food in the digestive system.
The food passes through the mouth, oesophagus, stomach, small intestine, large intestine, rectum and anus.
-
Name all the organs of the digestive system.
The main organs are the mouth, oesophagus, stomach, small intestine, large intestine, rectum and anus.
-
Draw and label the parts of the human digestive system.
Draw and label: Mouth, Oesophagus, Stomach, Small intestine, Large intestine, Rectum and Anus.
VI. Answer the following questions in four or five sentences.
-
After eating food, what happens to the food inside your body? Name and explain the system involved.
The digestive system processes the food we eat. Digestion begins in the mouth, where teeth chew the food and saliva softens it. The food passes through the oesophagus to the stomach, where it is mixed and broken down further. In the small intestine, nutrients are absorbed into the blood. The large intestine absorbs water and forms waste for elimination.
-
Why is it important to eat healthy food for the proper working of organ systems?
Healthy food provides the nutrients and energy needed by our body. A balanced diet helps the digestive system work properly. It also supports the proper functioning of other organ systems. Healthy food helps us remain fit and strong.
WORKSHEET - 3
Concept : Respiratory system and respiration process.
I. Rewrite the following words two times.
| Breathing | Respiration | Windpipe | Lungs | Energy |
|---|---|---|---|---|
| Breathing Breathing |
Respiration Respiration |
Windpipe Windpipe |
Lungs Lungs |
Energy Energy |
| Exhalation | Inhalation | Spongy | Oxygen | Carbon dioxide |
| Exhalation Exhalation |
Inhalation Inhalation |
Spongy Spongy |
Oxygen Oxygen |
Carbon dioxide Carbon dioxide |
II. Fill in the blanks.
- The process of taking oxygen in and giving carbon dioxide out is respiration.
- Taking air into the lungs is called inhalation.
- Breathing out carbon dioxide from the lungs is called exhalation.
III. Read the following paragraph and answer the given questions.
Hi children! Do you know who I am? I am the respiratory system of your body. And I work nonstop to keep you alive. Every breath begins at the nose, where I welcome fresh air. I guide it down the windpipe and into the lungs, my soft and spongy homes. Here, I collect oxygen and pass it into the blood like a precious gift. Your cells use this oxygen to release energy from food, helping you move, think, and play. While I do this, I gather carbon dioxide, a waste gas. I send it back to the lungs and push it out. Breath by breath, I keep you active, healthy, and alive.
-
Name the main parts of the respiratory system mentioned in the paragraph.
The main parts mentioned are the nose, windpipe and lungs.
-
Which system in our body works nonstop to keep us alive?
The respiratory system works nonstop to keep us alive.
-
How do our cells use the oxygen we breathe?
Our cells use oxygen to release energy from food. This energy helps us move, think and play.
IV. Multiple Choice questions.
-
Which organs are part of the respiratory system?
Answer: B) Nose, windpipe, lungs
-
What happens to the lungs during inhalation?
Answer: C) They get enlarged
-
Which gas in inhaled air helps release energy from food?
Answer: B) Oxygen
-
What is the process of breathing out called?
Answer: C) Exhalation
-
Which gas is exhaled from the body after energy is released?
Answer: B) Carbon dioxide and water vapour
V. Answer the following questions in two or three sentences.
-
How does the respiratory system help our body?
The respiratory system takes in oxygen and removes carbon dioxide. Oxygen is passed into the blood and used by cells to release energy from food.
-
Compare the digestive system and the respiratory system.
The digestive system breaks down food and absorbs nutrients. The respiratory system takes in oxygen and removes carbon dioxide. Both systems help provide what the body needs to stay alive and healthy.
-
Draw and label the parts of the human respiratory system.
Draw and label: Nose, Windpipe and Lungs.
VI. Answer the following questions in four or five sentences.
-
Describe the main parts of the human respiratory system and state one function of each part. (Nose, windpipe, lungs)
The nose is the entry point for air and helps us take in fresh air. The windpipe carries air from the nose towards the lungs. The lungs are soft and spongy organs where oxygen is collected and passed into the blood. The lungs also help remove carbon dioxide from the body during exhalation.
-
What happens to the air we breathe in? Explain how oxygen is used by the body and how carbon dioxide is sent out.
Air enters the body through the nose and travels down the windpipe into the lungs. The lungs collect oxygen and pass it into the blood. Our cells use oxygen to release energy from food. Carbon dioxide is collected as a waste gas and sent back to the lungs. It is pushed out of the body during exhalation.
WORKSHEET - 4
Concept : Circulatory system and making a stethoscope.
I. Rewrite the following words two times.
| Stethoscope | Heart | Arteries | Veins | Pulmonary |
|---|---|---|---|---|
| Stethoscope Stethoscope |
Heart Heart |
Arteries Arteries |
Veins Veins |
Pulmonary Pulmonary |
| Blood vessels | Circulation | Deoxygenated | Ventricles | Haemoglobin |
| Blood vessels Blood vessels |
Circulation Circulation |
Deoxygenated Deoxygenated |
Ventricles Ventricles |
Haemoglobin Haemoglobin |
II. Match the following.
| A | Ans | B |
|---|---|---|
| 1. Blood vessels | ( d ) | A) Oxygenated blood from heart to body parts (except to lungs) |
| 2. Arteries | ( a ) | B) Deoxygenated blood from body parts to heart (except from lungs) |
| 3. Veins | ( b ) | C) Oxygenated blood from lungs to heart |
| 4. Pulmonary arteries | ( e ) | D) Means of transport of blood throughout the body |
| 5. Pulmonary veins | ( c ) | E) Deoxygenated blood from heart to lungs |
III. Observe the following mind map and answer the given questions.
-
Write the name of the organ that pumps blood.
Heart
-
State two functions of blood as shown in the diagram.
Blood carries oxygen to cells and carries nutrients to cells.
-
Differentiate between arteries and veins based on their functions.
Arteries carry blood away from the heart to body parts, except the pulmonary arteries which carry deoxygenated blood to the lungs. Veins carry blood from body parts back to the heart, except the pulmonary veins which carry oxygenated blood from the lungs to the heart.
IV. Multiple Choice Questions.
-
What are the main parts of the circulatory system?
Answer: B) Heart, blood, and blood vessels
-
Why is the heart called a pump?
Answer: D) It pushes blood to all parts of the body.
-
What useful materials does blood carry to body cells?
Answer: A) Oxygen and nutrients
V. Answer the following questions in two or three sentences.
-
Name the main parts of the human circulatory system and write one function each.
The main parts are the heart, blood and blood vessels. The heart pumps blood, blood carries oxygen and nutrients, and blood vessels transport blood throughout the body.
-
Why does heartbeat increase after exercise?
During exercise, the muscles need more oxygen and energy. The heart beats faster to pump more blood to the body parts.
-
Why do we need the circulatory system?
We need the circulatory system to transport oxygen and nutrients to body cells and carry wastes away. It helps keep the body functioning properly.
-
Draw and label the human heart.
Draw and label the main parts of the human heart, including the atria, ventricles, major blood vessels and valves.
VI. Answer the following questions in four or five sentences.
-
Explain the interdependency of the circulatory system and digestive system.
The digestive system breaks down food and absorbs nutrients mainly through the small intestine. These nutrients enter the blood. The circulatory system carries the nutrients to different parts of the body. In this way, the digestive system supplies nutrients and the circulatory system transports them to body cells.
-
Place your hand on your chest and feel your heartbeat. Which organ are you feeling, and what are its functions?
The organ we are feeling is the heart. The heart is a muscular organ that pumps blood throughout the body. It sends blood to different body parts and helps transport oxygen and nutrients. It also helps carry waste materials away from the cells.
WORKSHEET - 5
Concept : Excretory system & Nervous system
I. Rewrite the following words two times.
| Brain | Sweat glands | Kidneys | Abdomen | Eliminate |
|---|---|---|---|---|
| Brain Brain |
Sweat glands Sweat glands |
Kidneys Kidneys |
Abdomen Abdomen |
Eliminate Eliminate |
| Waste material | Purification | Urine | Connection | Transmit |
| Waste material Waste material |
Purification Purification |
Urine Urine |
Connection Connection |
Transmit Transmit |
II. Fill in the blanks.
- Removing the waste materials from our body is the duty of Excretory system.
- Kidneys are the parts of our excretory system that filter blood.
- Skin and Lungs are the excretory organs.
III. Read the following conversation and answer the given questions.
Body : So much waste is piled up in me daily.
Kidneys : I can eliminate most of the waste and water.
Body : How will you do it?
Kidneys : I will filter the waste from the blood I get.
Body : Very good! What about carbon dioxide?
Lungs : I am here to eliminate the waste gases.
Body : How will you do this?
Lungs : During exhalation, carbon dioxide will be sent out of the body.
Body : I am feeling hot! Hey skin, make me feel cooled down.
Skin : I am sending out the sweat. This will cool down the body.
Body : Very good! What else can you do?
Skin : Besides cooling the body, I also send out salts and some wastes.
Body : So, you are also sending out waste like the lungs along with your normal functioning.
Body : Now I am feeling clean, and now I will be healthy.
-
What is the main difference between the waste removed by the lungs and the waste removed by the kidneys?
Answer: C) Lungs remove gas waste (CO2); kidneys remove liquid waste.
-
Why is it important for the waste to be thrown out of the body?
Answer: B) To keep the body clean and healthy.
-
Both the skin and the kidneys help remove water from the body. How is the water removed by the skin different from the water removed by the kidneys?
The skin removes water from the body as sweat through the sweat glands. The kidneys remove excess water along with wastes in the form of urine.
V. Multiple Choice questions.
-
Why do we sweat while playing?
Answer: B) To cool the body
-
What may happen if waste is not removed from the body?
Answer: C) The body becomes sick.
-
What is one main function of the nervous system?
Answer: B) To help us think, feel, and respond to our surroundings
VI. Answer the following questions in two or three sentences.
-
How do the lungs help remove waste from the body?
The lungs remove carbon dioxide, a waste gas, from the body. Carbon dioxide is sent out during exhalation.
-
Why is the brain called an important organ? Explain.
The brain controls our actions and helps us think, feel and respond to our surroundings. It coordinates many activities of the body.
-
Explain why all organ systems must work together.
All organ systems perform different but connected functions. They work together to provide energy, transport materials, remove wastes and keep the body alive and healthy.
VI. Answer the following questions in four or five sentences.
-
Describe the main parts of the human circulatory system and explain the function of each part.
The main parts of the circulatory system are the heart, blood and blood vessels. The heart acts like a pump and pushes blood to all parts of the body. Blood carries oxygen and nutrients to body cells and carries wastes away. Blood vessels transport blood throughout the body. Together, these parts help maintain proper circulation.
-
What may happen if one organ system does not work properly? Explain with one example.
If one organ system does not work properly, other systems may also be affected because they depend on one another. For example, if the digestive system does not work properly, the body may not get enough nutrients. This can affect energy and the proper functioning of other organ systems.
ASSESSMENT
I. Multiple Choice Questions.
-
Which of the following correctly defines an organ system?
Answer: B) A group of organs working together to perform a common function
-
Which organ system helps in transporting oxygen and nutrients to all parts of the body?
Answer: C) Circulatory system
-
Ravi ran fast for some time and started breathing heavily. Which organ system is mainly helping him get more oxygen at that time?
Answer: B) Respiratory system
-
Meena ate food and later got energy to play. Which two organ systems worked together to help her get energy?
Answer: B) Digestive and respiratory systems
II. Answer the following questions in two or three sentences.
-
Why are the skeletal system and muscles studied together when learning about body movement?
Bones provide the framework of the body, while muscles pull on bones to produce movement. Joints also help the bones move. Therefore, the skeletal system and muscles work together for body movement.
-
The small intestine is long and coiled. How does this structure help in the digestion and absorption of nutrients?
Its long and coiled structure provides more surface and time for digestion and absorption. This helps nutrients from digested food to be absorbed efficiently.
III. Answer the following questions in four or five sentences.
-
During summer, your brother sweats a lot and becomes irritated while playing. How would you help him understand the importance and benefits of sweating?
I would explain that sweating is a normal function of the skin. Sweat helps cool the body when we become hot, especially while playing or exercising. It also helps remove some salts and wastes from the body. I would tell him to drink enough water and stay comfortable while playing. Sweating is therefore useful for keeping the body cool and healthy.
IV. Answer the following questions in five or six sentences.
-
Draw and explain the human digestive system.
Draw and label the mouth, oesophagus, stomach, small intestine, large intestine, rectum and anus. Digestion begins in the mouth, where food is chewed and mixed with saliva. It then passes through the oesophagus to the stomach. The stomach mixes and breaks down the food further. Nutrients are mainly absorbed in the small intestine. The large intestine absorbs water and prepares the remaining waste for elimination.
-
Our body is an amazing machine. How? Appreciate how different organ systems work together.
Our body is like an amazing machine because many organ systems work together continuously. The digestive system provides nutrients from food. The respiratory system supplies oxygen and removes carbon dioxide. The circulatory system carries oxygen and nutrients to all parts of the body. The excretory system removes wastes, while the nervous system controls and coordinates many activities. The skeletal and muscular systems support and move the body. Together, all these systems keep us alive, active and healthy.
