🌟 Class 7 Science Curiosity – Chapter 9 Solutions
🫀 Life Processes in Animals | Amresh Academy
✍️ 🔹 Very Short Answer Type Questions
What are life processes?
What is the role of saliva in digestion?
- Breaks starch into sugar 🍞➡️🍬
- Moistens food for easy swallowing
Name the organ where absorption of digested food occurs.
What is egestion?
What is the function of alveoli in lungs?
🧠 🔹 Short Answer Type Questions
What is rumination? Name animals that ruminate.
What happens to the food in the stomach during digestion?
- Food is churned
- Mixed with digestive juices
- Proteins broken down
- Bacteria destroyed 🦠
What does the liver secrete and what is its function?
What is the difference between breathing and respiration?
What happens to undigested food in the large intestine?
📖 🔹 Descriptive Answer Type Questions
Explain the process of digestion in the mouth.
- Teeth → crush food
- Saliva → breaks starch
- Tongue → mixes & pushes food
How is the small intestine adapted for absorption?
- Has villi (finger-like projections)
- Large surface area➡️ Nutrients absorbed into blood
How does a bird digest food without teeth?
- Uses gizzard
- Food crushed with stones➡️ Helps digestion
Describe the human respiratory system briefly.
- Air enters through nose
- Passes windpipe
- Reaches lungs
- Alveoli → gas exchange
What is the role of the diaphragm in breathing?
🚀 🔹 Exploring Questions
Why do we feel a sweet taste when we chew chapati for long?
Why is fibre important for a healthy digestive system?
- Helps bowel movement
- Prevents constipation
- Supports digestion
How is gas exchange affected during COVID-19 as per the chapter?
Why do fish need gills and humans have lungs?
How do frogs breathe in different stages of life?
- Tadpole → gills
- Adult → lungs + skin
