Life Processes


🔬 Chapter: Life Processes (Class 10 Science)

📚 Short Notes

🔹 1. Life Processes

Life processes are the processes which maintain body functions and are necessary for survival.
Examples: Nutrition, Respiration, Transportation, Excretion

🔹 2. Nutrition

Process of intake and utilization of nutrients.

Types of Nutrition:

  • Autotrophic: Organisms prepare their own food (e.g., plants)
  • Heterotrophic: Organisms depend on others for food (e.g., animals)

🌱 Autotrophic Nutrition (Photosynthesis)

  • Occurs in green plants
  • Uses: Carbon dioxide + Water + Sunlight + Chlorophyll
  • Produces: Glucose + Oxygen

Equation:
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂ (in presence of sunlight and chlorophyll)

🔹 3. Respiration

Process of breaking down glucose to release energy.

Types:

  • Aerobic (with oxygen): More energy, end products = CO₂ + H₂O
  • Anaerobic (without oxygen): Less energy, end products = alcohol or lactic acid

Equation:
Glucose → Energy + CO₂ + H₂O (aerobic)

🔹 4. Transportation

Transport of nutrients and gases in organisms.

  • In Humans:

    • Heart pumps blood
    • Arteries and veins carry oxygen and CO₂
    • Blood has RBCs (carry oxygen), WBCs (fight infection), Plasma (transport nutrients), Platelets (clotting)

  • In Plants:

    • Xylem: Transports water
    • Phloem: Transports food

🔹 5. Excretion

Removal of metabolic waste.

  • In Humans:

    • Kidneys filter urea from blood
    • Waste removed as urine

  • In Plants:

    • Waste stored in leaves, excreted via stomata or fallen leaves

✅ Key Terms

  • Chlorophyll: Green pigment in plants
  • Nephron: Unit of kidney
  • Alveoli: Air sacs in lungs for gas exchange
  • Transpiration: Water loss from leaves

 

Comments

Post a Comment

Popular posts from this blog

India – Notes

  India – Notes 1. Introduction to India Location : India is located in South Asia. It lies entirely in the Northern Hemisphere. Coordinates : From 8°4′N to 37°6′N latitude and 68°7′E to 97°25′E longitude. Time Zone : Indian Standard Time (IST) is UTC +5:30. Borders : Shares land borders with Pakistan, China, Nepal, Bhutan, Bangladesh, and Myanmar. Maritime borders with Sri Lanka, Maldives, and Indonesia. 2. Physical Geography of India A. Major Physiographic Divisions The Northern Mountains Includes the Himalayas (Greater, Lesser, and Shiwalik ranges). Important peaks: Mount Everest (Nepal), Kanchenjunga (India). Passes: Nathu La, Shipki La, Rohtang, Zoji La. The Northern Plains Formed by the Indus, Ganga, and Brahmaputra rivers. Extremely fertile alluvial soil. Divided into Punjab Plains, Ganga Plains, and Brahmaputra Valley. The Peninsular Plateau Oldest landmass; includes Deccan and Central Highlands. Rivers: Narmada, Godavari, Krishna. Rich i...
Read more

Climatic Regions of the World

  🌎 Climatic Regions of the World – Geography Notes 🔍 What is Climate? Climate refers to the average weather conditions in a region over a long period (typically 30 years or more). It includes elements like temperature, precipitation, humidity, wind, and atmospheric pressure. 📁 Classification of Climate The most widely used system is Köppen’s Climate Classification , developed by Wladimir Köppen. It is based on temperature and precipitation patterns and classifies the world into major climatic zones. 🗺️ Major Climatic Zones (Köppen Classification) 1. Tropical Climates (Group A) Location : 0° to 23.5° N and S (Tropics) Temperature : High year-round (above 18°C) Precipitation : Varies from very high to seasonal a. Tropical Rainforest (Af) Equatorial region (e.g., Amazon, Congo) Heavy rainfall throughout the year Evergreen forests b. Tropical Monsoon (Am) South and Southeast Asia Seasonal heavy rainfall due to monsoon winds Dense forests c. Tropical ...
Read more

Accounting (Commonly asked accounting journal entries)

Commonly asked accounting journal entries in question–answer format , covering important topics like Capital A/c, Drawing A/c, Stationery A/c , etc. ✅ 1. Capital Account Entry Q: Owner started business with cash ₹1,00,000. A: Journal Entry: Date Particulars L.F. Debit (₹) Credit (₹) ----- ------------------------------- ---- ---------- ----------- Cash A/c Dr. 1,00,000 To Capital A/c 1,00,000 (Being business started with cash) ✅ 2. Drawing Account Entry (Cash withdrawn for personal use) Q: Owner withdrew ₹5,000 for personal use. A: Journal Entry: Date Particulars L.F. Debit (₹) Credit (₹) ----- ------------------------------- ---- ---------- ----------- Drawings A/c Dr. 5,000 To Cash A/c 5,00...
Read more