Lungs | MCQs

Explanation

• The lungs are the organs responsible for exchanging oxygen and carbon dioxide through the process of respiration.
• They consist of air-carrying tubes (bronchi and bronchioles) and tiny sacs (alveoli) where gas exchange occurs.

Explanation

In humans and higher animals, the exchange of gases (oxygen and carbon dioxide) is carried out by the respiratory processes, which include:

• Breathing (inhalation and exhalation)
• Transport of gases through the blood
• Exchange of gases in the lungs (oxygen in, carbon dioxide out)

Explanation

Hepatitis is a disease of the liver, not the respiratory system.

Top Common diseases of the respiratory system include:

1. Asthma
2. Chronic obstructive pulmonary disease (COPD)
3. Pneumonia
4. Influenza (flu)
5. Tuberculosis (TB)
6. Bronchitis
7. Emphysema
8. Lung cancer
9. Cystic fibrosis
10. Pulmonary fibrosis

Explanation

• The de-oxygenated blood from the heart comes to the lungs through the Pulmonary artery
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• The deoxygenated blood returns from the body to the right atrium and from there enter the right ventricle that pumps it to the lungs through the main pulmonary artery (pulmonary trunk).
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• The pulmonary veins transport oxygenated blood back to the heart from the lungs
  

Explanation

• The trachea (windpipe) is a hollow tube in the chest.
• It connects the throat (pharynx) to the lungs, allowing air to pass through during breathing.

Explanation

• The ribcage, also known as the thoracic cage.
• It is a bony structure that encloses and protects the lungs, heart, and other organs in the thoracic cavity.
• It is composed of 24 ribs, the sternum (breastbone), and the 12 thoracic vertebrae.

Explanation

• Lungs are two soft, spongy, large balloon-like organs located in the chest cavity, specifically in the thoracic cavity.
• They are responsible for exchanging oxygen and carbon dioxide through the process of respiration.

Explanation

The Amazon rainforest is known as the "lungs of the world".

Because it absorbs carbon dioxide and produces oxygen.