Class 7 Science - PUNJAB
Life Processes in Animals
The chapter 'Life Processes in Animals' for Class 7 Punjab School Education Board (PSEB) explores the essential biological functions that keep animals alive and healthy. Students learn about nutrition in animals, ranging from ingestion to egestion, and the different modes of feeding in various creatures. It details the human digestive system, ruminant digestion in grass-eating animals, and feeding mechanisms in amoeba. Additionally, the chapter covers respiration, how animals breathe, and the transport of materials within the animal body, forming a crucial foundation for higher-class biology and scoring well in PSEB board exams.
Start Learning FreeKey Concepts
Nutrition in Animals
The process of taking in food and its utilization in the body for growth, energy, and repair, which includes ingestion, digestion, absorption, assimilation, and egestion.
Digestion in Humans
The breakdown of complex food components into simpler, soluble substances by the alimentary canal and associated digestive glands like the liver and pancreas.
Rumen Digestion
A specialized two-step digestion process in grass-eating animals (ruminants) where food is first stored in the rumen partially digested (cud) and later brought back to the mouth to be chewed thoroughly.
Respiration in Animals
The process of releasing energy from digested food through the intake of oxygen and release of carbon dioxide, utilizing organs like lungs, gills, skin, or trachea depending on the animal.
Transportation in Animals
The circulation of vital substances like oxygen, digested food, and waste products throughout the animal body using the circulatory system, which includes blood, blood vessels, and the heart.
Important Formulas
Board Exam Info
This chapter typically carries around 6-8 marks in the Punjab (PSEB) Class 7 Science examination. Common question types include multiple-choice questions, fill-in-the-blanks, labeling diagrams of the human digestive system, and short answer questions explaining terms like rumination, villi, and PSEB textbook exercise questions.
Frequently Asked Questions
What is rumination and why do cows do it?
Rumination is the process where grass-eating animals quickly swallow grass and store it in a part called the rumen. Later, it returns to the mouth in small lumps for thorough chewing to help digest tough cellulose easily.
What is the function of villi in the small intestine?
Villi are finger-like projections in the inner walls of the small intestine that increase the surface area for the absorption of digested food into the blood vessels.
How do amoeba take in food and digest it?
Amoeba uses false feet called pseudopodia to engulf food particles, forming a food vacuole where digestive juices are secreted to break down the food.
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