Class 7 Science — Chapter 9: Life Processes in Animals

What you'll learn

• ▸Human Digestive System Overview
• ▸Digestion in the Mouth
• ▸Digestion in the Stomach and Small Intestine
• ▸Absorption and Assimilation
• ▸Nutrition in Ruminants
• ▸Nutrition in Amoeba
• ▸Human Respiratory System
• ▸Mechanism of Breathing
• ▸Respiration in Other Organisms

Chapter Summary

--- PAGE 1 --- 9 Life Processes in Animals மருந்தென வேண்டாவாம் யாக்கைக்கு அருந்தியது அற்றது போற்றி உணின். If your food is fully digested before you eat again, you won't need medicine for pain. (Thirukkural 942) In the Grade 6 Science textbook *Curiosity*, chapter ‘Living Creatures: Exploring their Characteristics', we learnt about processes essential for survival of living beings like nutrition, respiration, excretion, and reproduction. These are collectively called life processes. In this chapter, we will learn about life processes such as nutrition and respiration in detail. 0777CH09 --- PAGE 2 --- Observe your surroundings and notice what animals eat. Animals eat different types of food. Bees and sunbirds suck the nectar of flowers, while infants of humans and many other animals feed on their mother’s milk. Snakes, like python, swallow the animals they prey upon. Some aquatic animals filter tiny food particles floating nearby and feed upon them. …

Practice Questions from this Chapter

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1. Explain how food moves through the body. Get Solution →
2. Describe what makes stomach acid so strong. Get Solution →
3. Compare animal digestive systems to ours. Get Solution →
4. What is the long tube extending from the mouth to the anus where food is digested? Get Solution →
5. According to the text, where does the journey of food begin in the human body? Get Solution →
6. The process of breaking down food into smaller pieces by crushing and chewing is called what? Get Solution →
7. What substance in the mouth contains a digestive juice that breaks down starch into sugar? Get Solution →
8. What is the name of the long, flexible tube that food passes through from the mouth to the stomach? Get Solution →

Did you know?

• 💡 The human small intestine can stretch over six meters long.
• 💡 Your stomach acid is strong enough to dissolve razor blades.
• 💡 Cows have four different stomach chambers for digestion.
• 💡 Some spiders digest prey externally by injecting digestive juices.
• 💡 Humans produce approximately one liter of saliva daily.

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