Nostril has mucous which is responsible for

The length of the windpipe which is present in front of the esophagus is

During the night when there is no photosynthesis, the leaf cells get oxygen from

In the air passageway, the nasal cavity opens into a muscular passage which is called

Which of the following is a narrow opening at the floor of the pharynx which leads into larynx?

The powerful poison, widely used as an insecticide

The respiratory disorder asthma leads to

In the air passageway, the trachea leads to two smaller tubes called

The trachea divides into two smaller tubes called

World no tobacco day is celebrated on

In plants, the cells that carry the process of photosynthesis in the day time are classified as

The respiratory disorder in which lungs are affected is called

The carbon dioxide produced during cellular respiration is

The aquatic plants get oxygen in

The amount of carbon dioxide (CO₂) present in the expired air is

The number of lobes in the left lung is

The pair of lungs are present in the cavity known as

How many pairs of ribs are present in the chest wall?

Which of the following is a poison used as an insecticide?

The alveolar ducts are present at the end of

In cellular respiration, CH bond of food break down through

The pulmonary carries the blood that is

The disorder in which, bronchi are inflamed and more mucus production occurs is

How many lobes right lung has?

The amount of carbon dioxide (CO₂) present in the inspired air is

The amount of oxygen present in inspired air is

The cells that line the sac-like structure of each alveolus are called

Trachea and bronchi are lined with ciliated and

Gaseous exchange in leaves and young stems occurs through

Smoking can also cause weakening and staining of