๐ Class 7 Science Curiosity – Chapter 9 Solutions
๐ซ Life Processes in Animals | Amresh Academy
✍️ ๐น Very Short Answer Type Questions
What are life processes?
What is the role of saliva in digestion?
- Breaks starch into sugar ๐➡️๐ฌ
- 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?
๐ง ๐น 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 ๐ฆ
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?
๐ ๐น 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?
๐ ๐น 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
