What is Life Processes Class 10: Complete Guide for NCERT Science
By ConceptScroll Team · Published on 19 June 2026 · 3 min read
In Class 10 Science, 'what is Life Processes' refers to the essential functions that all living organisms perform to sustain life. These include nutrition, respiration, transportation, and excretion, which help organisms grow, reproduce, and maintain homeostasis.
Definition and Importance of Life Processes
Life processes are the basic biological activities that living organisms perform to maintain life. These processes include nutrition, respiration, transportation, and excretion. They are essential because they enable organisms to grow, reproduce, respond to their environment, and maintain internal stability (homeostasis). In Class 10 NCERT Science, understanding life processes helps explain how cells and organisms function efficiently.
Types of Nutrition: Autotrophic vs Heterotrophic
Nutrition is the process by which organisms obtain food and energy. There are two main types:
- Autotrophic Nutrition: Organisms like plants prepare their own food using sunlight through photosynthesis.
- Heterotrophic Nutrition: Organisms like animals depend on other organisms for food.
Photosynthesis equation:
$$6CO_2 + 6H_2O + light \ energy \rightarrow C_6H_{12}O_6 + 6O_2$$
This process converts carbon dioxide and water into glucose and oxygen using sunlight.
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Understanding Respiration: How Energy is Released
Respiration is the process of breaking down glucose to release energy required for various life activities. It occurs in all living organisms.
- Aerobic respiration: Uses oxygen to break down glucose.
- Anaerobic respiration: Occurs without oxygen, producing less energy.
Aerobic respiration formula:
$$C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O + energy (ATP)$$
Energy released is stored as ATP, which powers cellular functions.
Transportation in Living Organisms: Movement of Substances
Transportation involves movement of nutrients, gases, and waste products within organisms.
- In plants, xylem transports water and minerals from roots to leaves, while phloem transports food from leaves to other parts.
- In animals, blood circulates oxygen, nutrients, and removes waste.
| Organism | Transport System | Function |
|---|---|---|
| Plants | Xylem and Phloem | Water, minerals, and food transport |
| Animals | Circulatory system | Transport of oxygen, nutrients, and wastes |
Excretion: Removing Metabolic Wastes
Excretion is the process of eliminating metabolic wastes produced during life processes. It helps maintain internal chemical balance.
- Plants excrete oxygen and some waste through stomata.
- Animals excrete carbon dioxide, urea, and other wastes via lungs, kidneys, and skin.
Effective excretion prevents toxic buildup and supports homeostasis.
Comparison of Life Processes in Plants and Animals
Life processes vary between plants and animals due to their structural and functional differences.
| Life Process | Plants | Animals |
|---|---|---|
| Nutrition | Autotrophic (photosynthesis) | Heterotrophic (ingestion) |
| Respiration | Aerobic | Aerobic and anaerobic |
| Transportation | Xylem and Phloem | Circulatory system (blood) |
| Excretion | Through stomata, roots | Through kidneys, lungs, skin |
Understanding these differences helps Class 10 students grasp how organisms adapt to their environments.
Frequently asked questions
What is the meaning of life processes in Class 10 Science?
Life processes are essential functions like nutrition, respiration, transportation, and excretion that sustain living organisms.
How do autotrophic and heterotrophic nutrition differ?
Autotrophic organisms make their own food via photosynthesis; heterotrophic organisms consume others for food.
Why is respiration important for living beings?
Respiration releases energy by breaking down glucose, which is vital for all cellular activities.
What role does transportation play in life processes?
Transportation moves water, nutrients, gases, and wastes within organisms to support their survival.
How do plants excrete waste products?
Plants excrete oxygen and other wastes through stomata and roots.
Can you name the main excretory organs in animals?
Main excretory organs in animals include kidneys, lungs, and skin.
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