CBSE Class 10th Biology: Types of Nutrition

Autotrophic Nutrition

• Autotrophic nutrition is the process by which organisms produce their own food using inorganic substances.
• Organisms that utilize this method include plants, algae, and some bacteria.
• They convert carbon dioxide and water into glucose through photosynthesis, using sunlight as an energy source.

Heterotrophic Nutrition

• Heterotrophic nutrition involves organisms that cannot synthesize their own food and rely on consuming other organisms.
• This type includes animals, fungi, and many bacteria.
• Distinctions in heterotrophic nutrition include saprophytic (decomposers), parasitic (organisms living off a host), and mutualistic (symbiotic relationships).

Human Digestive System

• The human digestive system consists of various organs, including the mouth, esophagus, stomach, intestines (small and large), liver, pancreas, and gallbladder.
• The mouth is responsible for mechanical digestion and initial enzymatic breakdown of food.
• The stomach further breaks down food through acidic environment and enzymes.
• The intestines absorb nutrients and water, with the small intestine primarily focusing on nutrient absorption and the large intestine on water reabsorption.

Main Function of the Human Digestive System

• The primary function of the human digestive system is to convert food into energy and essential nutrients.
• It facilitates the breakdown of food, the absorption of nutrients into the bloodstream, and the elimination of waste.
• Efficient digestion supports overall health, growth, and cellular repair.

Nutrition for Living Beings

• Nutrition involves the intake, digestion, absorption, and utilization of food and substances necessary for life.
• It encompasses essential elements including carbohydrates, proteins, fats, vitamins, and minerals.
• Proper nutrition is crucial for energy production, growth, and maintenance of bodily functions.

Test your knowledge of autotrophic and heterotrophic nutrition, important topics for the CBSE Class 10th Biology boards exam. Understand the processes by which organisms prepare their own food or obtain it from external sources.