Class 3 Exam > Class 3 Notes > Science for Class 3 > Worksheet: Human Body: Organ Systems
Class 3 Science - Human Body Organ Systems - CBSE Worksheets
Name the following
Question 1:
(a) Helps in movement of body organs _____________
(b) Helps in breakdown of food into simple pieces _____________
(c) Framework of bones _____________
(d) Helps circulation of digested food and oxygen in body _____________
(e) Helps in breathing _____________
MCQs
Question 2: Which of these organs controls all other organs of the body?
(a) Brain
(b) Kidneys
(c) Heart
(d) Stomach
Question 3: The sense organ that enables us to feel hot and cold is:
(a) nose
(b) eyes
(c) skin
(d) ear
Question 4: Which system converts food into a form in which it can be absorbed by the body?
(a) Circulatory
(b) Breathing
(c) Digestive
(d) Excretory
Question 5: Which of these is not a sense organ?
(a) Nerves
(b) Tongue
(c) Skin
(d) Ears
Question 6: Which of these is not a part of the circulatory system?
(a) Blood
(b) Stomach
(c) Blood vessels
(d) Heart
Question 7: Which organ system protects the soft organs in our body?
(a) Nervous
(b) Skeletal
(c) Digestive
(d) Muscular
Fill in the blanks
Question 8:
(a) The five sense organs in our body are _____________, _____________, _____________, _____________ and _____________
(b) The _____________ form a network of tubes which supply food and oxygen throughout the body.
(c) Our facial expression are caused by _____________ .
(d) Air enters the _____________ through the wind pipe.
(e) Breaking down food into tiny simple pieces is called _____________ of food.
True & False
Question 9:
- The brain is the control system of our body.
- Muscles and bones together enable us to move our body parts.
- A group of tissues form a cell.
- We can see with our eyes without the help of the brain.
- Blood continuously takes nutrients and gases to all parts of our body.
Answer the following questions in brief.
Question 10: What gives shape to our body?
Question 11: List the organs of the nervous system and write its function.
Question 12: What is the role of excretory system in the body?
Question 13: How are the delicate organs like lungs and heart in our body protected from injury?
Question 14: Name the materials that the circulatory system takes from one place to another in the body.
Question 15: Write the correct matching number below each picture.
(a) The Breathing System
(b) The Circulatory System
(c) The Digestive System
(d) The Excretory System
(e) The Nervous System
You can find Worksheets Solutions here: Worksheet Solution: Human Body: Organ Systems
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FAQs on Class 3 Science - Human Body Organ Systems - CBSE Worksheets
| 1. What are the different organ systems in the human body? |  |
Ans. The human body is composed of several organ systems, including the respiratory system, circulatory system, digestive system, nervous system, and skeletal system. These systems work together to maintain the body's overall function and health.
| 2. How does the respiratory system function in the human body? | |
Ans. The respiratory system is responsible for taking in oxygen and expelling carbon dioxide. It includes organs such as the lungs, trachea, and diaphragm. When we breathe in, the air enters the nose or mouth, travels down the trachea, and into the lungs. In the lungs, oxygen is transferred to the bloodstream, while carbon dioxide is removed from the body when we exhale.
| 3. What is the role of the circulatory system in the human body? | |
Ans. The circulatory system, also known as the cardiovascular system, is responsible for transporting oxygen, nutrients, hormones, and waste products throughout the body. It consists of the heart, blood vessels, and blood. The heart pumps oxygen-rich blood to different organs and tissues via arteries, while veins carry oxygen-depleted blood back to the heart for oxygenation.
| 4. How does the digestive system work to break down food? | |
Ans. The digestive system processes food and extracts nutrients for the body's energy and growth. It includes organs such as the mouth, esophagus, stomach, small intestine, and large intestine. When we eat, food enters the mouth and is broken down by chewing and saliva. It then travels down the esophagus to the stomach, where it is further broken down by stomach acid and digestive enzymes. Nutrients are absorbed in the small intestine, and waste products are eliminated through the large intestine.
| 5. What is the function of the nervous system in the human body? | |
Ans. The nervous system is responsible for coordinating and controlling the body's activities and responses to stimuli. It consists of the brain, spinal cord, and nerves. The brain receives and processes sensory information, sends signals to different parts of the body, and controls various bodily functions. The spinal cord acts as a communication pathway between the brain and the rest of the body, while nerves transmit signals between the brain, spinal cord, and other body parts.
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