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Respiration is a fundamental biological process crucial for the survival of all living organisms. In Class 7, students explore the complexities of respiration, including how different organisms adapt their respiratory mechanisms to their environments. Understanding these concepts is essential, as they form the basis for more advanced studies in biology.
To aid in this learning, comprehensive worksheets on “Respiration in Organisms” are provided, offering a variety of questions and answers to reinforce the material covered in the curriculum. These worksheets are designed to be both informative and engaging, helping students grasp the core concepts effectively.
The worksheets encompass a range of topics, from the basic definition of respiration and the differences between aerobic and anaerobic processes to the specific respiratory adaptations seen in various organisms like fish, earthworms, and plants. Each worksheet is crafted to challenge students and enhance their understanding through multiple-choice questions, true/false statements, fill-in-the-blanks, and short-answer questions.
For instance, Infinity Learn offers detailed notes and practice questions that align with the latest CBSE syllabus, ensuring that students are well-prepared for their exams. By utilizing these worksheets, students can solidify their understanding of how organisms breathe, the physiological processes involved, and the importance of respiration in sustaining life.
Worksheet 1: Basics of Respiration
Q. Define respiration.
Respiration is the process of breaking down food to release energy.
Q. Explain aerobic and anaerobic respiration.
Answer: Aerobic uses oxygen, anaerobic does not.
Q. What are the byproducts of anaerobic respiration in yeast?
Answer: Ethanol and carbon dioxide.
Worksheet 2: Human Respiratory System
Q. Describe the role of the diaphragm in breathing.
Answer: The diaphragm contracts and moves downwards to allow lungs to expand during inhalation and relaxes to push air out during exhalation.
Q. Why is breathing called an involuntary action?
Answer: Because it is controlled by the brain.
Also Read: Nutrition in Animals Worksheets
Download Respiration In Organisms Class 7 Worksheet PDF
Worksheet 3: Respiration in Animals
Q. How do fish respire?
Answer: Fish respire through gills which extract oxygen from water.
Q. Explain the tracheal system in insects.
Answer: Air enters through spiracles and travels through trachea directly to tissues.
Worksheet 4: Respiration in Plants
Q. How do plants respire?
Answer: Through stomata in leaves and lenticels in stems.
Q. Why do roots need oxygen?
Answer: For respiration to release energy for growth and nutrient absorption.
Also Read: Acids, Bases, and Salts Worksheets
Worksheet 5: Differences Between Aerobic and Anaerobic Respiration
Q. Compare aerobic and anaerobic respiration in terms of energy produced.
Answer: Aerobic respiration produces more energy than anaerobic.
Worksheet 6: Respiratory Disorders
Q. What causes asthma?
Answer: Inflammation and narrowing of airways.
Q. How does smoking affect the lungs?
Answer: Damages alveoli and reduces oxygen intake.
Worksheet 7: Respiratory Organs in Different Animals
Q. Describe how earthworms breathe.
Answer: Through their moist skin.
Q. What is the role of spiracles in cockroaches?
Answer: Allow air to enter and leave the tracheal system.
Also Read: Soil Worksheets
Worksheet 8: Respiratory System Functions
Q. List the functions of the human respiratory system.
Answer: Oxygen intake, carbon dioxide expulsion, and energy production.
Worksheet 9: Process of Inhalation and Exhalation
Q. What happens to the ribs during inhalation?
Answer: They move outward and upward.
Q. Describe the process of exhalation.
Answer: Diaphragm relaxes, pushing air out of the lungs.
Worksheet 10: Adaptations for Respiration
Q. How are aquatic animals adapted for respiration?
Answer: Through gills that extract oxygen from water.
Q. Why do mountaineers carry oxygen cylinders?
Answer: To compensate for lower oxygen levels at high altitudes.
Worksheet 11: True or False
- All animals respire aerobically. (F)
- Insects use lungs for respiration. (F)
- Plants respire through stomata and lenticels. (T)
- Overwatering plants can harm them due to lack of oxygen. (T)
- Frogs use gills for respiration underwater. (F)
Worksheet 12: Fill in the Blanks
Aerobic means _____.
Answer: With oxygen.
Oxygen passes into Amoeba through _____.
Answer: Cell membrane.
Human beings take oxygen through _____.
Answer: Lungs.
During respiration, energy is released in the form of _____.
Answer: ATP (Adenosine Triphosphate).
Whales have _____ for respiration.
Answer: Lungs.
Less energy is produced in _____ respiration.
Answer: Anaerobic.
