How does mucus help in passage of food ?

What is emulsification ? How does it help in digestion of fats ?

How do illusions help

How does a stem help the plant?

Common passage for food and air is

Read the passage and answer the questions: Our food consists of carbohydrates, proteins, fats, vitamins and minerals. Besides these water and fibre are also present. The quantity of food components varies from type to type. Which component helps in easy digestive of food?

How does diaphragm help in inhalation ?

How does prunning help in making the hedge dense ?

Draw a neatly labeled diagram showing a peristaltic movement in esophagus Explain the importance of mucus on the walls of food pipe.

Draw a neatly labled diagram showing a peristaltic movement in oesophagus. Explain the importance of mucus on the walls of food pipe.

How does squirrel help in growth of several nut trees at different places?