Class 7 Science - BIHAR
Life Processes in Animals
The chapter 'Life Processes in Animals' in Class 7 Science explores the essential biological activities that keep animals alive. Students will learn about nutrition and digestion in various animals, how breathing and respiration take place, the transport of substances like blood through the circulatory system, and the removal of waste via excretion. Understanding these interconnected systems is crucial for Bihar Board examinations, as questions frequently test both basic definitions and diagram-based processes like human digestion and respiration.
Start Learning FreeKey Concepts
Nutrition and Digestion
Animals take in complex food and break it down into simpler, usable substances through a process called digestion, which involves ingestion, digestion, absorption, assimilation, and egestion.
Respiration
Cells break down digested food using oxygen to release energy, which can happen through lungs in humans, gills in fish, or skin in earthworms.
Circulatory System
The heart, blood vessels, and blood work together to transport oxygen, nutrients, and waste materials to and from different parts of the animal's body.
Excretion
The biological process of removing harmful metabolic wastes from the body, carried out by organs like kidneys in humans.
Rumen Digestion
Grass-eating animals like cows swallow grass quickly, store it in the rumen, and later bring it back to the mouth to chew it again (cud chewing).
Important Formulas
Board Exam Info
In the Bihar Board Class 7 Science examinations, this chapter typically carries around 6 to 8 marks. Questions usually include objective fill-in-the-blanks, short-answer questions on animal respiration and excretion, and diagram labeling tasks such as the human digestive system.
Frequently Asked Questions
Why do cows chew continuously even when they are not eating?
Cows are ruminants. They swallow grass quickly and store it in a part of the stomach called the rumen. Later, this partially digested food (cud) returns to the mouth in small lumps so the animal can chew it thoroughly.
What is the difference between breathing and respiration?
Breathing is just the physical process of taking in oxygen-rich air and giving out carbon dioxide-rich air. Respiration is a broader biochemical process that includes breathing plus the breakdown of food inside cells to release energy.
How do single-celled animals like Amoeba digest food?
Amoeba captures food using finger-like projections called pseudopodia, engulfs it into a food vacuole, and releases digestive juices directly into the vacuole to digest it.
Learn Life Processes in Animals with Your AI Tutor
10 different ways to study this chapter. Free for 3 chapters per day.
Lecture
Key Points
Interactive
Quiz
Flashcards