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Chapter: 05. Human Respiratory System

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The surface of alveoli is covered with a fine network of _ _ _ _ _ _ _ _ _ _ _ _ _.

Lungs are the main _ _ _ _ _ _ _ _ _ _ _ _ _ organs.

The opening of trachea (glottis) in pharynx is guarded by a muscular flap called _ _ _ _ _ _ _ _ _ _ _ _ _ or uvula.

Normally, we breathe _ _ _ _ _ _ _ _ _ _ _ _ _ times per minute.

Larynx is also called _ _ _ _ _ _ _ _ _ _ _ _ _ or Adam’s apple.

The _ _ _ _ _ _ _ _ _ _ _ _ _ open into nasal passages.

The larynx connects the _ _ _ _ _ _ _ _ _ _ _ _ _ to the trachea.

During inhalation, the _ _ _ _ _ _ _ _ _ _ _ _ _ are raised upwards and outwards.

_ _ _ _ _ _ _ _ _ _ _ _ _ is the breakdown of glucose inside the cells to produce carbon dioxide and energy.

The process of taking in oxygen by the cell, oxidation of food with this oxygen and the release of energy and carbon dioxide is called _ _ _ _ _ _ _ _ _ _ _ _ _.

The air inhaled has more _ _ _ _ _ _ _ _ _ _ _ _ _ and less _ _ _ _ _ _ _ _ _ _ _ _ _.

Tuberculosis is an infectious bacterial disease caused by _ _ _ _ _ _ _ _ _ _ _ _ _.

Lungs are enclosed in an airtight _ _ _ _ _ _ _ _ _ _ _ _ _ cavity.

A large muscular _ _ _ _ _ _ _ _ _ _ _ _ _ forms the floor of thoracic cavity.

Limewater turns _ _ _ _ _ _ _ _ _ _ _ _ _ in the presence of carbon dioxide.

Asthma is a lung disease in which airways get _ _ _ _ _ _ _ _ _ _ _ _ _ and produce extra mucus.

Bronchitis is inflammation or swelling of _ _ _ _ _ _ _ _ _ _ _ _ _ tubes.

Children are vaccinated with _ _ _ _ _ _ _ _ _ _ _ _ _ injections against TB.

Sound is produced by vibrations in _ _ _ _ _ _ _ _ _ _ _ _ _.

The wall of trachea is supported with C-shaped rings of _ _ _ _ _ _ _ _ _ _ _ _ _.

Lungs have numerous tiny, thin-walled and air-filled sacs called _ _ _ _ _ _ _ _ _ _ _ _ _.

During exhalation, the diaphragm moves _ _ _ _ _ _ _ _ _ _ _ _ _ (returns to original position).

Breathing rate increases up to _ _ _ _ _ _ _ _ _ _ _ _ _ times per minute during fast running and heavy exercise.

The process of giving out air rich in carbon dioxide is called _ _ _ _ _ _ _ _ _ _ _ _ _.

The air exhaled has less _ _ _ _ _ _ _ _ _ _ _ _ _ and more _ _ _ _ _ _ _ _ _ _ _ _ _.

When breathing rate slows down to the extent that we do not get sufficient oxygen, we feel _ _ _ _ _ _ _ _ _ _ _ _ _ or _ _ _ _ _ _ _ _ _ _ _ _ _.

Pneumonia is a _ _ _ _ _ _ _ _ _ _ _ _ _ disease which causes an inflammation of lungs and affects alveoli.

During external respiration, oxygen combines with _ _ _ _ _ _ _ _ _ _ _ _ _ to form oxyhaemoglobin.

Inside the lungs, bronchi divide and redivide into _ _ _ _ _ _ _ _ _ _ _ _ _.

_ _ _ _ _ _ _ _ _ _ _ _ _ is a mechanical process, while _ _ _ _ _ _ _ _ _ _ _ _ _ is a biochemical process.

The process of taking in air rich in oxygen into the lungs is called _ _ _ _ _ _ _ _ _ _ _ _ _.

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