NCERT Solutions for Curiosity Chapter 9 Life Processes in Animals

About this chapter

Nutrition, respiration, circulation, excretion and reproduction are the life processes that keep an animal alive. This chapter takes up nutrition and respiration in detail. Complex food components — carbohydrate, protein and fat — are broken into simpler forms inside a long tube called the alimentary canal , which runs from the mouth to the anus. Digestion begins in the mouth: teeth do mechanical digestion and saliva starts changing starch into sugar. The stomach adds digestive juice, acid and mucus; the liver adds bile and the pancreas adds pancreatic juice. The small intestine (about 6 m) is the longest part of the canal. Its thin inner lining carries thousands of finger-like projections that absorb the digested nutrients into the blood. The large intestine (about 1.5 m) is shorter but w

• .1 Nutrition in Animals
• .1.1 Digestion in human beings
• .1.2 Do all animals digest food the same way as humans do?
• .2.1 Respiration in humans
• .2.2 Do other animals breathe the same way as humans do?
• Chapter exercises
• Interdisciplinary projects