Life Processes in Animals — Important Questions

Breaks down starch into sugar, Moistens food for easy swallowing, Helps in mixing food

Saliva has multiple functions: it contains digestive juice to break down starch, moistens food, and helps mix food. Bacteria killing happens in the stomach, and absorption occurs in the small intestine.

Trap dust and dirt

The tiny hair in nostrils, along with mucus, help filter the air by trapping dust and dirt particles, which is why we should breathe through our nose.

Nostrils, Windpipe, Lungs, Alveoli

The respiratory system includes nostrils, windpipe, lungs, and alveoli. The stomach is part of the digestive system, not the respiratory system.

It moves downward

When we inhale, the diaphragm moves downward, increasing space in the chest cavity and allowing air to enter the lungs.