Human Respiratory System

Etiology of lung disease

• Underlying lung disease, especially emphysema, may have blister-like defects in lung tissue called bullae or blebs.

• Lung disease is primarily caused by viral infections.

• Exposure to cold weather is a major cause of lung disease.

• Lung disease is solely due to genetic factors.

It is a medical emergency

• Types of Pneumothorax

• Common Cold

• Seasonal Allergies

• Chronic Bronchitis

Gunshot Wounds

• A type of penetrating injury that can cause open chest wounds.

• A type of blunt force trauma that results in bruising.

• A superficial injury that only affects the skin.

• A type of injury caused by a fall from a height.

Illustration of a person in a car accident with an airbag deployment.

• Depicts a non-penetrating chest trauma scenario in a motor vehicle accident.

• Illustrates a penetrating chest injury caused by a sharp object.

• Shows a person safely exiting a vehicle after a crash.

• Represents a minor fender bender with no injuries.

Stabbing

• A type of injury caused by a blunt object.

• A penetrating injury that can lead to open chest wounds.

• A superficial cut that does not penetrate the skin.

• An injury caused by a fall from a height.

Mechanism for development of spontaneous pneumothorax

• Illustration of ruptured bleb and pleural space.

• Presence of fluid in the pleural cavity.

• Increased intrathoracic pressure due to coughing.

• Weakness of the lung tissue due to infection.

Effect of increased tension in tension pneumothorax

• Pressure is placed on the heart and great vessels, causing a mediastinal shift.

• Increased lung capacity due to air accumulation.

• Decreased blood flow to the lungs.

• Expansion of the thoracic cavity without any effect on the heart.

Open Rib Fracture

• A type of penetrating injury affecting the chest.

• A fracture that does not break the skin.

• A type of fracture that occurs in the arm.

• A fracture caused by a fall from a height.

Diagram of Penetrating Chest Injury

• Visual representation of a penetrating chest injury.

• Illustration of a broken rib.

• Image of a lung infection.

• Diagram of a heart attack.

Pressure in the pleural space is lower than that inside the lungs.

• This difference in pressure is crucial for lung inflation.

• This pressure difference prevents lung collapse.

• This pressure is equal to atmospheric pressure.

• This pressure difference is irrelevant to breathing.