Class 7 Science - ODISHA
Life Processes in Animals
The chapter Life Processes in Animals for Class 7 students under the Odisha Board (BSE) explores the essential activities that keep animals alive. Students will learn how different animals obtain food through nutrition, convert it into energy via respiration, transport vital substances through circulation, and remove waste products through excretion. Understanding these interconnected biological systems is crucial for board exams as it forms the foundational knowledge of human and animal physiology, frequently appearing in both objective and short-answer questions.
Start Learning FreeKey Concepts
Animal Nutrition
The process of taking in food and using it for energy, growth, and repair, which includes ingestion, digestion, absorption, assimilation, and egestion.
Respiration in Animals
The process of breaking down digested food inside cells using oxygen to release energy, carried out through specialized organs like lungs, gills, skin, or tracheae.
Circulatory System
The system consisting of the heart, blood vessels, and blood that transports oxygen, nutrients, and waste products to and from all parts of the body.
Excretion
The biological process of removing harmful metabolic waste products and excess water from the body to maintain internal balance.
Transport in Humans
The movement of blood containing red blood cells, white blood cells, platelets, and plasma through arteries, veins, and capillaries driven by the pumping action of the heart.
Important Formulas
Board Exam Info
This chapter typically carries around 6 to 8 marks in the Odisha (BSE) Class 7 Science annual examinations. Common question types include multiple-choice questions, matching columns, diagram-based questions on the human heart or excretory system, and short descriptive answers explaining life processes like respiration and excretion.
Frequently Asked Questions
What is the difference between breathing and respiration?
Breathing is just the physical process of taking in oxygen and giving out carbon dioxide, whereas respiration is a chemical process that occurs inside cells to release energy from food.
Why do different animals have different respiratory organs?
Different animals live in different habitats; for example, fish live in water and use gills, while land animals like humans use lungs to take in oxygen directly from the air.
What is the main function of blood in our body?
Blood transports oxygen from the lungs to body cells, carries digested food nutrients, removes carbon dioxide and waste products, and helps fight diseases.
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