NCERT Exemplar Solution for Class 7 Science Chapter-10 Respiration in Organisms
Respiration is one of the most important life processes that keeps all living organisms alive and active. Chapter 10 Respiration in Organisms explains how energy is released from food and how different organisms breathe in different ways. The chapter introduces students to breathing, respiration, aerobic and anaerobic respiration, and the functioning of respiratory organs in humans and animals. Through simple examples and activities, students understand why oxygen is necessary for survival and how our body produces energy for daily activities. The NCERT Exemplar Solution for Class 7 Science helps learners understand these scientific concepts with clear explanations and practice-based exercises. By solving the NCERT Exemplar Solution for class 7, students improve their understanding of biological processes and gain confidence in answering analytical questions. These explanations also support classroom learning and strengthen important topics covered in NCERT solutions for class 7 science.
Find the Exercises PDF of NCERT Exemplar Solution for Class 7 Science Chapter-10 Respiration in Organisms
Understanding Respiration and Breathing
The chapter begins by explaining the difference between breathing and respiration. Breathing is the physical process of inhaling oxygen-rich air and exhaling carbon dioxide-rich air. Respiration, however, is the chemical process in which food is broken down inside cells to release energy.
Students learn that oxygen reaches different body parts through the blood and helps in the breakdown of glucose. This process releases energy required for growth, movement, and other life activities. Carbon dioxide produced during respiration is removed from the body through exhalation. The chapter also explains aerobic respiration, which takes place in the presence of oxygen. Most organisms, including humans, use aerobic respiration to produce energy efficiently. During vigorous exercise, our muscles may not get enough oxygen, leading to anaerobic respiration and the production of lactic acid. This causes muscle cramps and tiredness.
The NCERT Exemplar Solution for Class 7 includes conceptual and activity-based questions that help students understand the difference between breathing and respiration more clearly. These exercises improve observation skills and scientific reasoning abilities.
Human Respiratory System and Breathing Mechanism
One of the key topics in this chapter is the human respiratory system. Students learn about important respiratory organs such as the nose, windpipe, lungs, and diaphragm. Air enters the body through the nostrils, where it gets filtered and warmed before reaching the lungs.
Inside the lungs, oxygen passes into the bloodstream while carbon dioxide moves out of the blood into the lungs. The diaphragm and chest muscles help in the movement of air during inhalation and exhalation. This continuous exchange of gases keeps the body functioning properly. The chapter also introduces the concept of breathing rate. Students observe that breathing becomes faster during physical activities because the body requires more energy and oxygen. Activities such as running, climbing stairs, or playing sports increase the breathing rate temporarily.
The NCERT Exemplar Solution provides step-by-step explanations of respiratory processes and helps students answer application-based questions confidently. The solutions simplify difficult biological terms and make revision easier before examinations.
Respiration in Different Organisms
Different organisms have different methods of respiration depending on their body structure and habitat. Fish breathe through gills, earthworms respire through their moist skin, and insects use tiny openings called spiracles connected to air tubes. Plants also respire continuously, although the process is different from photosynthesis. They exchange gases through tiny pores called stomata present on leaves. The chapter explains that all living organisms require energy and therefore perform respiration.
Students also learn about organisms that survive without oxygen for short periods. Yeast carries out anaerobic respiration and produces alcohol and carbon dioxide. This process is useful in baking and fermentation industries. These examples help students understand the diversity of life processes in nature. The NCERT Exemplar Solution for Class 7 strengthens conceptual understanding through multiple-choice questions, fill-in-the-blanks, and reasoning-based exercises.
Importance of Practising NCERT Exemplar Questions
NCERT exemplar questions are designed to improve conceptual clarity and logical thinking. They encourage students to apply scientific concepts rather than memorise definitions. Chapter 10 includes many practical and observation-based questions that improve analytical skills.
Practising the NCERT Exemplar Solution regularly helps students understand important concepts such as respiration, breathing mechanism, gas exchange, and aerobic respiration more effectively. These exercises also improve answer-writing skills and boost confidence during exams. This chapter forms a strong foundation for advanced biology topics related to human physiology and life processes in higher classes. Consistent practice helps students revise concepts thoroughly and perform better academically.